Mikaeus, the Unhallowed + Shilgengar, Sire of Famine + Obstinate Gargoyle

Mikaeus, the Unhallowed

Shilgengar, Sire of Famine

Obstinate Gargoyle

How it works

1. Activate Shilgengar by sacrificing Obstinate Gargoyle.
2. When Obstinate Gargoyle 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 Obstinate Gargoyle.
5. When Obstinate Gargoyle 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.