Nim Deathmantle + Ashnod's Altar + Minotaur, Roxxon CEO

Nim Deathmantle

Ashnod's Altar

Minotaur, Roxxon CEO

How it works

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