Carrion Feeder + Gravespawn Sovereign + Intruder Alarm

UB identity

Commander legal

The 3 combo pieces

• Carrion Feeder
• Gravespawn Sovereign
• Intruder Alarm

What must be in place

You control at least three other Zombies and an additional nontoken creature.

How to execute it

1. Activate Carrion Feeder by sacrificing a nontoken creature, putting a +1/+1 counter on it.
2. Activate Gravespawn Sovereign by tapping five untapped Zombies you control, returning any creature from your graveyard to the battlefield.
3. The creature enters the battlefield, triggering Intruder Alarm, untapping all creatures.
4. Repeat.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures