Emeria Shepherd + Wormfang Newt + Grimgrin, Corpse-Born

Emeria Shepherd

Wormfang Newt

Grimgrin, Corpse-Born

How it works

1. Activate Grimgrin by sacrificing Wormfang Newt.
2. When Wormfang Newt dies, its second ability triggers, returning a Plains from exile to the battlefield.
3. When the Plains enters the battlefield, Emeria Shepherd triggers.
4. Holding priority, activate the Plains by tapping it, adding .
5. Resolve the Emeria Shepherd trigger, returning Wormfang Newt from your graveyard to the battlefield.
6. When Wormfang Newt enters the battlefield, its first ability triggers, exiling a Plains.
7. Resolve the Grimgrin ability from step 1, putting a +1/+1 counter on it.
8. Repeat.