Mikaeus, the Unhallowed + Shilgengar, Sire of Famine + Wingrattle Scarecrow

Mikaeus, the Unhallowed

Shilgengar, Sire of Famine

Wingrattle Scarecrow

How it works

1. Activate Shilgengar by sacrificing Wingrattle Scarecrow.
2. When Wingrattle Scarecrow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Resolve the Shilgengar ability.
4. Activate Shilgengar by sacrificing Wingrattle Scarecrow.
5. When Wingrattle Scarecrow dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Shilgengar ability.
7. Repeat.