Mikaeus, the Unhallowed + Shilgengar, Sire of Famine + Rendclaw Trow

Mikaeus, the Unhallowed

Shilgengar, Sire of Famine

Rendclaw Trow

How it works

1. Activate Shilgengar by sacrificing Rendclaw Trow.
2. When Rendclaw Trow 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 Rendclaw Trow.
5. When Rendclaw Trow 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.