Stalwart Successor + Shilgengar, Sire of Famine + Obstinate Gargoyle

Stalwart Successor

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. When Obstinate Gargoyle enters, Stalwart Successor triggers, putting a +1/+1 counter on Obstinate Gargoyle
4. Resolve the Shilgengar ability.
5. Repeat.