Vesperlark + Activated Sleeper + Carrion Feeder

Prerequisites

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Steps

1. 1Activate Carrion Feeder by sacrificing Vesperlark.
2. 2When Vesperlark dies, it triggers, returning Activated Sleeper from your graveyard to the battlefield as a copy of Vesperlark.
3. 3Activate Carrion Feeder by sacrificing Activated Sleeper.
4. 4When Activated Sleeper dies, it triggers, returning Activated Sleeper from your graveyard to the battlefield as a copy of Vesperlark.
5. 5Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
6. 6Repeat from step 3.

Effects

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