Vesperlark + Body Double + Yahenni, Undying Partisan

Vesperlark

Body Double

Yahenni, Undying Partisan

How it works

1. Activate Yahenni, Undying Partisan by sacrificing Body Double.
2. When Body Double leaves the battlefield, its Vesperlark ability triggers, returning itself from your graveyard to the battlefield as a copy of Vesperlark.
3. Resolve the Yahenni, Undying Partisan ability.
4. Repeat.

This clever loop revolves around Body Double entering the battlefield as a copy of Vesperlark, leveraging Vesperlark's leaves-the-battlefield trigger to pull itself right back out of the graveyard. Yahenni, Undying Partisan acts as the ultimate catalyst, providing a free sacrifice outlet while growing stronger with every iteration of the cycle. Because the creature returning from the graveyard can continually reset as a copy of Vesperlark via Body Double's clever replacement effect, you can sacrifice it over and over again.