Nim Deathmantle + Ashnod's Altar + Dryad Arbor + Field of the Dead

Nim Deathmantle

Ashnod's Altar

Dryad Arbor

Field of the Dead

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, Field of the Dead triggers, creating a creature token.
4. Activate Ashnod's Altar by sacrificing the creature token, adding CC.
5. Repeat.