Ob Nixilis, Unshackled + Radiant Performer + Field of Ruin Combo

All permanents on the battlefield.

An opponent controls at least one nonbasic land.

available

Activate Field of Ruin's second ability by paying , tapping and sacrificing it, targeting any nonbasic land an opponent controls.

Holding priority, cast Radiant Performer by paying .

When Radiant Performer enters the battlefield, it triggers, copying Field of Ruin's ability for each other nonbasic land your opponents control.

Resolve the first Field of Ruin ability, destroying the land it it targeting, then causing each player to search their library for a basic land card and put it onto the battlefield.

Ob Nixilis' first ability triggers for each opponent who searches this way, causing each opponent to sacrifice a creature and lose 10 life.

Repeat from step 4 for each other Field of Ruin ability.

Significant lifeloss