Bile Urchin + Gravespawn Sovereign + Intruder Alarm

UB identity

Commander legal

The 3 combo pieces

• Bile Urchin
• Gravespawn Sovereign
• Intruder Alarm

What must be in place

At least four other Zombies on the battlefield.

How to execute it

1. Sacrifice Bile Urchin to have target opponent lose 1 life.
2. Tap 5 untapped zombies you control to return Bile Urchin to the battlefield.
3. Intruder Alarm triggers, untapping all creatures.
4. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite lifeloss