Carrion Feeder + Glen Elendra Archmage + Thran Vigil

UB identity

Commander legal

The 3 combo pieces

• Carrion Feeder
• Glen Elendra Archmage
• Thran Vigil

How to execute it

1. Activate Carrion Feeder by sacrificing Glen Elendra Archmage.
2. When Glen Elendra Archmage dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil triggers, putting a +1/+1 counter on Glen Elendra Archmage.
4. Resolve the Carrion Feeder ability.
5. Repeat.

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers