Hawkeye's Bow + Kiora's Follower + North Pole Patrol Combo

All permanents on the battlefield (Hawkeye's Bow attached to either Kiora's Follower or North Pole Patrol on the battlefield and Kiora's Follower and North Pole Patrol without summoning sickness on the battlefield).

Activate Kiora's Follower by tapping it, targeting North Pole Patrol.

If Kiora's Follower has Hawkeye's Bow attached to it, Hawkeye's Bow triggers, dealing 1 damage to each opponent.

Resolve the Kiora's Follower ability, untapping North Pole Patrol.

Activate North Pole Patrol by tapping it, targeting Kiora's Follower.

If North Pole Patrol has Hawkeye's Bow attached to it, Hawkeye's Bow triggers, dealing 1 damage to each opponent.

Resolve the North Pole Patrol ability, untapping Kiora's Follower.

Repeat.

Infinite damage