Shilgengar, Sire of Famine + Kithkin Spellduster + Thran Vigil

Shilgengar, Sire of Famine

Kithkin Spellduster

Thran Vigil

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. Thran Vigil triggers, putting a +1/+1 counter on Kithkin Spellduster.
4. Resolve the Shilgengar ability.
5. Repeat.