Mikaeus, the Unhallowed, Deathbringer Thoctar, and Carrion Feeder

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Deathbringer Thoctar on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Deathbringer Thoctar by removing a +1/+1 counter from it, dealing 1 damage to any target
2. Repeat step 1 until Deathbringer Thoctar has no +1/+1 counters on it
3. Activate Carrion Feeder by sacrificing Deathbringer Thoctar
4. Deathbringer Thoctar dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it
5. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
6. Repeat

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers