Mikaeus, the Unhallowed + Shilgengar, Sire of Famine + Kithkin Spellduster

Mikaeus, the Unhallowed

Shilgengar, Sire of Famine

Kithkin Spellduster

How it works

1. Activate Shilgengar by sacrificing Kithkin Spellduster.
2. When Kithkin Spellduster 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 Kithkin Spellduster.
5. When Kithkin Spellduster 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.