Bladewing the Risen (Commander) - Core Reanimator

Jeremy Rowe
May 3, 2025
Building a Dragon Commander Deck With The Ur-Dragon
Let's see how to build a new Dragon Commander deck with The Ur-Dragon, including cards from Tarkir: Dragonstorm.
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Dragonspeaker Shaman
75%inclusion9 decks12 decks
74%synergy
Ganax, Astral Hunter
75%inclusion9 decks12 decks
73%synergy
Lathliss, Dragon Queen
75%inclusion9 decks12 decks
73%synergy
Crux of Fate
75%inclusion9 decks12 decks
73%synergy
Hellkite Courser
67%inclusion8 decks12 decks
66%synergy
Scourge of Valkas
67%inclusion8 decks12 decks
65%synergy
Dragon Tempest
67%inclusion8 decks12 decks
65%synergy
Thunderbreak Regent
58%inclusion7 decks12 decks
58%synergy
Animate Dead
67%inclusion8 decks12 decks
57%synergy
Utvara Hellkite
58%inclusion7 decks12 decks
57%synergy
Top Cards
Reanimate
75%inclusion9 decks12 decks
52%synergy
Faithless Looting
58%inclusion7 decks12 decks
30%synergy
Big Score
58%inclusion7 decks12 decks
38%synergy
Dragonlord's Servant
58%inclusion7 decks12 decks
57%synergy
Cathartic Reunion
50%inclusion6 decks12 decks
44%synergy
Unexpected Windfall
50%inclusion6 decks12 decks
36%synergy
Feed the Swarm
50%inclusion6 decks12 decks
9%synergy
Skyline Despot
50%inclusion6 decks12 decks
49%synergy
Anger
50%inclusion6 decks12 decks
37%synergy
Dragon Mage
50%inclusion6 decks12 decks
49%synergy
Creatures
Rivaz of the Claw
50%inclusion6 decks12 decks
49%synergy
Terror of the Peaks
50%inclusion6 decks12 decks
45%synergy
Parapet Thrasher
44%inclusion4 decks9 decks
44%synergy
Scavenger Regent
44%inclusion4 decks9 decks
44%synergy
Stormshriek Feral
44%inclusion4 decks9 decks
44%synergy
Drakuseth, Maw of Flames
42%inclusion5 decks12 decks
39%synergy
Atsushi, the Blazing Sky
42%inclusion5 decks12 decks
38%synergy
Ryusei, the Falling Star
42%inclusion5 decks12 decks
41%synergy
Goldspan Dragon
42%inclusion5 decks12 decks
33%synergy
Terror of Mount Velus
42%inclusion5 decks12 decks
41%synergy
Knollspine Dragon
42%inclusion5 decks12 decks
40%synergy
Hellkite Tyrant
42%inclusion5 decks12 decks
38%synergy
Backdraft Hellkite
42%inclusion5 decks12 decks
41%synergy
Scourge of the Throne
33%inclusion4 decks12 decks
32%synergy
Wrathful Red Dragon
33%inclusion4 decks12 decks
32%synergy
Hoarding Broodlord
33%inclusion4 decks12 decks
29%synergy
Malfegor
33%inclusion4 decks12 decks
33%synergy
Cavern-Hoard Dragon
33%inclusion4 decks12 decks
31%synergy
Dragonmaster Outcast
33%inclusion4 decks12 decks
32%synergy
Kokusho, the Evening Star
33%inclusion4 decks12 decks
32%synergy
Chainer, Nightmare Adept
25%inclusion3 decks12 decks
17%synergy
Balefire Dragon
25%inclusion3 decks12 decks
23%synergy
Decadent Dragon
25%inclusion3 decks12 decks
20%synergy
Bogardan Hellkite
25%inclusion3 decks12 decks
25%synergy
Steel Hellkite
25%inclusion3 decks12 decks
24%synergy
Bonehoard Dracosaur
25%inclusion3 decks12 decks
22%synergy
Ancient Brass Dragon
25%inclusion3 decks12 decks
23%synergy
Reckless Barbarian
25%inclusion3 decks12 decks
22%synergy
Glorybringer
25%inclusion3 decks12 decks
25%synergy
Bladewing, Deathless Tyrant
25%inclusion3 decks12 decks
23%synergy
Hellkite Charger
25%inclusion3 decks12 decks
24%synergy
Thundermaw Hellkite
25%inclusion3 decks12 decks
25%synergy
Boneyard Scourge
25%inclusion3 decks12 decks
24%synergy
Immersturm Predator
25%inclusion3 decks12 decks
23%synergy
Magmatic Hellkite
22%inclusion2 decks9 decks
22%synergy
Thundermane Dragon
22%inclusion2 decks9 decks
22%synergy
Boltwing Marauder
17%inclusion2 decks12 decks
16%synergy
Ancient Copper Dragon
17%inclusion2 decks12 decks
13%synergy
Rorix Bladewing
17%inclusion2 decks12 decks
17%synergy
Thunder Dragon
17%inclusion2 decks12 decks
17%synergy
Shivan Dragon
17%inclusion2 decks12 decks
16%synergy
Boggart Trawler
17%inclusion2 decks12 decks
10%synergy
Junji, the Midnight Sky
17%inclusion2 decks12 decks
14%synergy
Incinerator of the Guilty
17%inclusion2 decks12 decks
16%synergy
Vampiric Dragon
17%inclusion2 decks12 decks
16%synergy
Bladewing's Thrall
17%inclusion2 decks12 decks
16%synergy
Academy Manufactor
17%inclusion2 decks12 decks
9%synergy
Kolaghan, the Storm's Fury
17%inclusion2 decks12 decks
15%synergy
Dragonhawk, Fate's Tempest
17%inclusion2 decks12 decks
15%synergy
Hexing Squelcher
14%inclusion1 decks7 decks
1%synergy
Instants
Thrill of Possibility
42%inclusion5 decks12 decks
23%synergy
Rakdos Charm
42%inclusion5 decks12 decks
-2%synergy
Terminate
42%inclusion5 decks12 decks
2%synergy
Bedevil
42%inclusion5 decks12 decks
7%synergy
Entomb
33%inclusion4 decks12 decks
26%synergy
Seething Song
33%inclusion4 decks12 decks
22%synergy
Hagra Mauling
25%inclusion3 decks12 decks
23%synergy
Fell the Profane
25%inclusion3 decks12 decks
13%synergy
Dark Ritual
25%inclusion3 decks12 decks
-17%synergy
Rescue from the Underworld
25%inclusion3 decks12 decks
25%synergy
Bitter Triumph
25%inclusion3 decks12 decks
20%synergy
Burnt Offering
25%inclusion3 decks12 decks
20%synergy
Malakir Rebirth
25%inclusion3 decks12 decks
10%synergy
Bolt Bend
25%inclusion3 decks12 decks
15%synergy
Sarkhan's Triumph
25%inclusion3 decks12 decks
24%synergy
Cauldron Dance
25%inclusion3 decks12 decks
25%synergy
Spit Flame
25%inclusion3 decks12 decks
24%synergy
Withering Torment
25%inclusion3 decks12 decks
3%synergy
Chaos Warp
17%inclusion2 decks12 decks
-31%synergy
Stinging Study
17%inclusion2 decks12 decks
15%synergy
Untimely Malfunction
17%inclusion2 decks12 decks
-2%synergy
Demand Answers
17%inclusion2 decks12 decks
4%synergy
Cathartic Pyre
17%inclusion2 decks12 decks
15%synergy
Kazuul's Fury
17%inclusion2 decks12 decks
13%synergy
Zuko's Conviction
14%inclusion1 decks7 decks
13%synergy
Laughing Mad
11%inclusion1 decks9 decks
7%synergy
Go for the Throat
8.3%inclusion1 decks12 decks
1%synergy
Dark Bargain
8.3%inclusion1 decks12 decks
8%synergy
Moonlight Bargain
8.3%inclusion1 decks12 decks
8%synergy
Doom Blade
8.3%inclusion1 decks12 decks
7%synergy
Culling the Weak
8.3%inclusion1 decks12 decks
2%synergy
Dragon's Fire
8.3%inclusion1 decks12 decks
8%synergy
Pyretic Ritual
8.3%inclusion1 decks12 decks
3%synergy
Magmaquake
8.3%inclusion1 decks12 decks
8%synergy
Black Sun's Twilight
8.3%inclusion1 decks12 decks
8%synergy
Smelt
8.3%inclusion1 decks12 decks
8%synergy
Hostile Negotiations
8.3%inclusion1 decks12 decks
7%synergy
Electric Revelation
8.3%inclusion1 decks12 decks
8%synergy
Live or Die
8.3%inclusion1 decks12 decks
8%synergy
Unlicensed Disintegration
8.3%inclusion1 decks12 decks
6%synergy
Abrade
8.3%inclusion1 decks12 decks
-13%synergy
Valakut Awakening
8.3%inclusion1 decks12 decks
1%synergy
Sorceries
Victimize
42%inclusion5 decks12 decks
27%synergy
Persist
33%inclusion4 decks12 decks
31%synergy
Buried Alive
33%inclusion4 decks12 decks
28%synergy
Living Death
33%inclusion4 decks12 decks
29%synergy
Zombify
33%inclusion4 decks12 decks
32%synergy
Imposing Grandeur
33%inclusion4 decks12 decks
32%synergy
Tormenting Voice
33%inclusion4 decks12 decks
29%synergy
Diabolic Tutor
25%inclusion3 decks12 decks
19%synergy
Haunting Voyage
25%inclusion3 decks12 decks
24%synergy
Torrent of Souls
25%inclusion3 decks12 decks
25%synergy
Seize the Spoils
25%inclusion3 decks12 decks
18%synergy
Blasphemous Act
25%inclusion3 decks12 decks
-26%synergy
Ever After
25%inclusion3 decks12 decks
25%synergy
Final Parting
25%inclusion3 decks12 decks
23%synergy
Stitch Together
25%inclusion3 decks12 decks
24%synergy
Bitter Revelation
25%inclusion3 decks12 decks
25%synergy
Exhume
25%inclusion3 decks12 decks
24%synergy
Unmarked Grave
17%inclusion2 decks12 decks
14%synergy
Patriarch's Bidding
17%inclusion2 decks12 decks
14%synergy
Dread Return
17%inclusion2 decks12 decks
12%synergy
Vandalblast
17%inclusion2 decks12 decks
-14%synergy
Read the Bones
17%inclusion2 decks12 decks
4%synergy
Pirate's Pillage
17%inclusion2 decks12 decks
13%synergy
Twinflame
17%inclusion2 decks12 decks
11%synergy
Diresight
17%inclusion2 decks12 decks
14%synergy
Syphon Mind
17%inclusion2 decks12 decks
12%synergy
Necromantic Selection
17%inclusion2 decks12 decks
16%synergy
Will of the Abzan
11%inclusion1 decks9 decks
10%synergy
Will of the Jeskai
11%inclusion1 decks9 decks
9%synergy
Chain Reaction
8.3%inclusion1 decks12 decks
4%synergy
Incarnation Technique
8.3%inclusion1 decks12 decks
8%synergy
Wheel of Fate
8.3%inclusion1 decks12 decks
8%synergy
Discerning Taste
8.3%inclusion1 decks12 decks
8%synergy
Molten Disaster
8.3%inclusion1 decks12 decks
8%synergy
Crackle with Power
8.3%inclusion1 decks12 decks
5%synergy
Hate Mirage
8.3%inclusion1 decks12 decks
7%synergy
Sinister Waltz
8.3%inclusion1 decks12 decks
7%synergy
Past in Flames
8.3%inclusion1 decks12 decks
6%synergy
Fiery Confluence
8.3%inclusion1 decks12 decks
4%synergy
Heat Shimmer
8.3%inclusion1 decks12 decks
6%synergy
Profane Command
8.3%inclusion1 decks12 decks
7%synergy
Glimpse the Impossible
8.3%inclusion1 decks12 decks
6%synergy
Night's Whisper
8.3%inclusion1 decks12 decks
-11%synergy
Earthquake
8.3%inclusion1 decks12 decks
7%synergy
Ransack the Lab
8.3%inclusion1 decks12 decks
8%synergy
In Garruk's Wake
8.3%inclusion1 decks12 decks
5%synergy
Wheel of Fortune
8.3%inclusion1 decks12 decks
2%synergy
Mana Geyser
8.3%inclusion1 decks12 decks
-4%synergy
Beacon of Unrest
8.3%inclusion1 decks12 decks
7%synergy
Terminal Agony
8.3%inclusion1 decks12 decks
4%synergy
Utility Artifacts
Hazoret's Monument
50%inclusion6 decks12 decks
47%synergy
Whip of Erebos
33%inclusion4 decks12 decks
27%synergy
Wayfarer's Bauble
25%inclusion3 decks12 decks
12%synergy
Urza's Incubator
25%inclusion3 decks12 decks
23%synergy
Altar of Dementia
25%inclusion3 decks12 decks
23%synergy
Panharmonicon
17%inclusion2 decks12 decks
16%synergy
Herald's Horn
17%inclusion2 decks12 decks
12%synergy
Conjurer's Closet
17%inclusion2 decks12 decks
12%synergy
Gathering Stone
14%inclusion1 decks7 decks
12%synergy
Coin of Mastery
14%inclusion1 decks7 decks
13%synergy
The Darkness Crystal
11%inclusion1 decks9 decks
8%synergy
The Fire Crystal
11%inclusion1 decks9 decks
3%synergy
Mesmeric Orb
8.3%inclusion1 decks12 decks
8%synergy
Ruby Medallion
8.3%inclusion1 decks12 decks
-3%synergy
Belbe's Portal
8.3%inclusion1 decks12 decks
8%synergy
Traveler's Amulet
8.3%inclusion1 decks12 decks
8%synergy
Nim Deathmantle
8.3%inclusion1 decks12 decks
8%synergy
Mimic Vat
8.3%inclusion1 decks12 decks
7%synergy
Phyrexian Altar
8.3%inclusion1 decks12 decks
3%synergy
Sword of Hearth and Home
8.3%inclusion1 decks12 decks
6%synergy
Blade of Selves
8.3%inclusion1 decks12 decks
3%synergy
Key to the City
8.3%inclusion1 decks12 decks
5%synergy
Lightning Greaves
8.3%inclusion1 decks12 decks
-27%synergy
Collector's Vault
8.3%inclusion1 decks12 decks
6%synergy
Enchantments
Corroding Dragonstorm
33%inclusion3 decks9 decks
33%synergy
Crucible of Fire
25%inclusion3 decks12 decks
24%synergy
Molten Echoes
25%inclusion3 decks12 decks
22%synergy
Ripples of Undeath
25%inclusion3 decks12 decks
22%synergy
Necromancy
25%inclusion3 decks12 decks
22%synergy
Breaching Dragonstorm
22%inclusion2 decks9 decks
22%synergy
Bitter Reunion
17%inclusion2 decks12 decks
14%synergy
Underworld Connections
17%inclusion2 decks12 decks
16%synergy
Warstorm Surge
17%inclusion2 decks12 decks
13%synergy
Black Market Connections
17%inclusion2 decks12 decks
-1%synergy
Cover of Darkness
17%inclusion2 decks12 decks
16%synergy
The Legend of Roku
14%inclusion1 decks7 decks
11%synergy
Ninja Teen
14%inclusion1 decks7 decks
14%synergy
Flameshadow Conjuring
8.3%inclusion1 decks12 decks
6%synergy
Dragon Breath
8.3%inclusion1 decks12 decks
8%synergy
The Eldest Reborn
8.3%inclusion1 decks12 decks
8%synergy
Leyline of Combustion
8.3%inclusion1 decks12 decks
8%synergy
Pain Magnification
8.3%inclusion1 decks12 decks
7%synergy
Necrosynthesis
8.3%inclusion1 decks12 decks
8%synergy
Dragon Roost
8.3%inclusion1 decks12 decks
8%synergy
Fervor
8.3%inclusion1 decks12 decks
7%synergy
Vicious Shadows
8.3%inclusion1 decks12 decks
8%synergy
Cemetery Tampering
8.3%inclusion1 decks12 decks
8%synergy
Murderous Betrayal
8.3%inclusion1 decks12 decks
8%synergy
Fable of the Mirror-Breaker
8.3%inclusion1 decks12 decks
5%synergy
Bastion of Remembrance
8.3%inclusion1 decks12 decks
2%synergy
Revel in Riches
8.3%inclusion1 decks12 decks
2%synergy
Bloodchief Ascension
8.3%inclusion1 decks12 decks
3%synergy
Pestilence
8.3%inclusion1 decks12 decks
6%synergy
Sneak Attack
8.3%inclusion1 decks12 decks
6%synergy
Outpost Siege
8.3%inclusion1 decks12 decks
7%synergy
Goblin Bombardment
8.3%inclusion1 decks12 decks
-1%synergy
Oppression
8.3%inclusion1 decks12 decks
7%synergy
Planeswalkers
Sarkhan, Fireblood
25%inclusion3 decks12 decks
24%synergy
Liliana, Death's Majesty
8.3%inclusion1 decks12 decks
8%synergy
Utility Lands
Bojuka Bog
67%inclusion8 decks12 decks
31%synergy
Geier Reach Sanitarium
58%inclusion7 decks12 decks
53%synergy
Barren Moor
33%inclusion4 decks12 decks
29%synergy
Crucible of the Spirit Dragon
33%inclusion4 decks12 decks
33%synergy
Arena of Glory
25%inclusion3 decks12 decks
16%synergy
Tomb Fortress
25%inclusion3 decks12 decks
25%synergy
Takenuma, Abandoned Mire
25%inclusion3 decks12 decks
16%synergy
Forgotten Cave
17%inclusion2 decks12 decks
12%synergy
Restless Vents
17%inclusion2 decks12 decks
12%synergy
Command Beacon
17%inclusion2 decks12 decks
10%synergy
Rix Maadi, Dungeon Palace
17%inclusion2 decks12 decks
14%synergy
Shizo, Death's Storehouse
8.3%inclusion1 decks12 decks
3%synergy
Phyrexian Tower
8.3%inclusion1 decks12 decks
-2%synergy
Desert of the Fervent
8.3%inclusion1 decks12 decks
7%synergy
Hall of the Bandit Lord
8.3%inclusion1 decks12 decks
7%synergy
Molten Slagheap
8.3%inclusion1 decks12 decks
6%synergy
Boseiju, Who Shelters All
8.3%inclusion1 decks12 decks
7%synergy
Blast Zone
8.3%inclusion1 decks12 decks
8%synergy
Mirrorpool
8.3%inclusion1 decks12 decks
8%synergy
Spinerock Knoll
8.3%inclusion1 decks12 decks
-1%synergy
War Room
8.3%inclusion1 decks12 decks
5%synergy
Emergence Zone
8.3%inclusion1 decks12 decks
5%synergy
Darksteel Citadel
8.3%inclusion1 decks12 decks
4%synergy
Cactus Preserve
8.3%inclusion1 decks12 decks
8%synergy
Reliquary Tower
8.3%inclusion1 decks12 decks
-10%synergy
Drownyard Temple
8.3%inclusion1 decks12 decks
7%synergy
Homeward Path
8.3%inclusion1 decks12 decks
7%synergy
Temple of the False God
8.3%inclusion1 decks12 decks
-2%synergy
Mana Artifacts
Sol Ring
100%inclusion12 decks12 decks
14%synergy
Arcane Signet
75%inclusion9 decks12 decks
-7%synergy
Dragon's Hoard
75%inclusion9 decks12 decks
74%synergy
Rakdos Signet
58%inclusion7 decks12 decks
0%synergy
Talisman of Indulgence
50%inclusion6 decks12 decks
-5%synergy
Dragonstorm Globe
44%inclusion4 decks9 decks
44%synergy
Orb of Dragonkind
33%inclusion4 decks12 decks
32%synergy
Carnelian Orb of Dragonkind
25%inclusion3 decks12 decks
24%synergy
Commander's Sphere
17%inclusion2 decks12 decks
0%synergy
Hedron Archive
17%inclusion2 decks12 decks
15%synergy
Cursed Mirror
17%inclusion2 decks12 decks
5%synergy
Mind Stone
17%inclusion2 decks12 decks
-12%synergy
Mox Jasper
11%inclusion1 decks9 decks
11%synergy
Everflowing Chalice
8.3%inclusion1 decks12 decks
5%synergy
Charcoal Diamond
8.3%inclusion1 decks12 decks
0%synergy
Coldsteel Heart
8.3%inclusion1 decks12 decks
7%synergy
Heraldic Banner
8.3%inclusion1 decks12 decks
7%synergy
Planar Atlas
8.3%inclusion1 decks12 decks
8%synergy
Patchwork Banner
8.3%inclusion1 decks12 decks
4%synergy
Fellwar Stone
8.3%inclusion1 decks12 decks
-25%synergy
Fire Diamond
8.3%inclusion1 decks12 decks
0%synergy
Thought Vessel
8.3%inclusion1 decks12 decks
-10%synergy
Worn Powerstone
8.3%inclusion1 decks12 decks
5%synergy
Liquimetal Torque
8.3%inclusion1 decks12 decks
3%synergy
Lands
Swamp
100%inclusion12 decks12 decks
2%synergy
Mountain
100%inclusion12 decks12 decks
3%synergy
Command Tower
92%inclusion11 decks12 decks
6%synergy
Dragonskull Summit
83%inclusion10 decks12 decks
20%synergy
Smoldering Marsh
75%inclusion9 decks12 decks
12%synergy
Maelstrom of the Spirit Dragon
67%inclusion6 decks9 decks
66%synergy
Blood Crypt
58%inclusion7 decks12 decks
12%synergy
Foreboding Ruins
58%inclusion7 decks12 decks
13%synergy
Path of Ancestry
58%inclusion7 decks12 decks
42%synergy
Raucous Theater
50%inclusion6 decks12 decks
28%synergy
Graven Cairns
50%inclusion6 decks12 decks
19%synergy
Temple of Malice
50%inclusion6 decks12 decks
17%synergy
Haven of the Spirit Dragon
50%inclusion6 decks12 decks
49%synergy
Sulfurous Springs
50%inclusion6 decks12 decks
3%synergy
Rakdos Carnarium
42%inclusion5 decks12 decks
10%synergy
Luxury Suite
42%inclusion5 decks12 decks
4%synergy
Tainted Peak
42%inclusion5 decks12 decks
-1%synergy
Blightstep Pathway
42%inclusion5 decks12 decks
19%synergy
Shadowblood Ridge
33%inclusion4 decks12 decks
-2%synergy
Temple of the Dragon Queen
33%inclusion4 decks12 decks
33%synergy
Canyon Slough
33%inclusion4 decks12 decks
14%synergy
Exotic Orchard
33%inclusion4 decks12 decks
2%synergy
Cavern of Souls
33%inclusion4 decks12 decks
29%synergy
Haunted Ridge
33%inclusion4 decks12 decks
-2%synergy
Bloodstained Mire
33%inclusion4 decks12 decks
0%synergy
Hagra Mauling
25%inclusion3 decks12 decks
23%synergy
Fell the Profane
25%inclusion3 decks12 decks
13%synergy
Blackcleave Cliffs
25%inclusion3 decks12 decks
5%synergy
Blazemire Verge
25%inclusion3 decks12 decks
-6%synergy
Malakir Rebirth
25%inclusion3 decks12 decks
10%synergy
Evolving Wilds
25%inclusion3 decks12 decks
4%synergy
Fabled Passage
17%inclusion2 decks12 decks
8%synergy
Badlands
17%inclusion2 decks12 decks
3%synergy
Terramorphic Expanse
17%inclusion2 decks12 decks
1%synergy
Boggart Trawler
17%inclusion2 decks12 decks
10%synergy
Secluded Courtyard
17%inclusion2 decks12 decks
14%synergy
Demolition Field
17%inclusion2 decks12 decks
14%synergy
Kazuul's Fury
17%inclusion2 decks12 decks
13%synergy
Urborg Volcano
8.3%inclusion1 decks12 decks
7%synergy
Akoum Refuge
8.3%inclusion1 decks12 decks
2%synergy
Drossforge Bridge
8.3%inclusion1 decks12 decks
2%synergy
Spire of Industry
8.3%inclusion1 decks12 decks
6%synergy
Unclaimed Territory
8.3%inclusion1 decks12 decks
5%synergy
Horizon of Progress
8.3%inclusion1 decks12 decks
8%synergy
Bloodfell Caves
8.3%inclusion1 decks12 decks
-11%synergy
Sulfurous Mire
8.3%inclusion1 decks12 decks
5%synergy
Thriving Bluff
8.3%inclusion1 decks12 decks
6%synergy
Maestros Theater
8.3%inclusion1 decks12 decks
6%synergy
Thriving Moor
8.3%inclusion1 decks12 decks
6%synergy
Bloodsoaked Insight
8.3%inclusion1 decks12 decks
0%synergy