Exchange of Words + Scute Swarm + Mutavault

Exchange of Words

Scute Swarm

Mutavault

How it works

1. Activate Mutavault's first ability by tapping it, adding C.
2. Activate Mutavault's second ability by paying 1, causing it to become a 2/2 creature that is still a land until end of turn.
3. Cast Exchange of Words by paying 1, exchanging the text boxes of Mutavault and Scute Swarm.
4. Play a land.
5. The land enters the battlefield, triggering Mutavault's Scute Swarm ability, creating a copy of Mutavault with its original text.
6. Step 5 repeats in a mandatory loop unless interrupted, drawing the game.