Viscera Seer + Thran Vigil + Grazing Kelpie

Viscera Seer

Thran Vigil

Grazing Kelpie

How it works

1. Activate Viscera Seer by sacrificing Grazing Kelpie.
2. When Grazing Kelpie 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 Grazing Kelpie.
4. Resolve the Viscera Seer ability.
5. Repeat.