Nim Deathmantle + Ashnod's Altar + Brindle Shoat

Nim Deathmantle

Ashnod's Altar

Brindle Shoat

How it works

1. Activate Ashnod's Altar by sacrificing Brindle Shoat, adding CC.
2. When Brindle Shoat dies, it and Nim Deathmantle triggers.
3. Resolve the Brindle Shoat trigger, creating a 3/3 Boar creature token.
4. Activate Ashnod's Altar by sacrificing the Boar, adding CC.
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay 4 to return Brindle Shoat from your graveyard to the battlefield, and attach Nim Deathmantle to it.
6. Repeat.