Nim Deathmantle + Ashnod's Altar + Dryad Arbor + Zendikar's Roil

Nim Deathmantle

Ashnod's Altar

Dryad Arbor

Zendikar's Roil

How it works

1. Activate Ashnod's Altar by sacrificing Dryad Arbor, adding CC.
2. When Dryad Arbor dies, Nim Deathmantle triggers, causing you to pay 4 to return Dryad Arbor from your graveyard to the battlefield, and attaching Nim Deathmantle to it.
3. When Dryad Arbor enters the battlefield, Zendikar's Roil triggers, creating a 2/2 Elemental creature token.
4. Activate Ashnod's Altar by sacrificing the creature token, adding CC.
5. Repeat.