The Master, Multiplied + Dark Depths + Vampire Hexmage + Mishra's Groundbreaker + Replication Technique

The Master, Multiplied

Dark Depths

Vampire Hexmage

Mishra's Groundbreaker

Replication Technique

How it works

1. Cast Replication Technique by paying 4, creating a token copy of Dark Depths.
2. Activate Mishra's Groundbreaker by tapping and sacrificing it, causing Dark Depths to become a creature.
3. Activate Vampire Hexmage by sacrificing it, removing all counters from the Dark Depths token.
4. The Dark Depths token triggers, causing you to not sacrifice it due to The Master.
5. Step 4 repeats infinitely, creating a mandatory infinite loop, causing the game to end in a draw.