Ashnod the Uncaring + Whisper, Blood Liturgist + Corridor Monitor

Prerequisites

• You control at least one additional nontoken creature.
• You have at least one creature card in your graveyard.
• Whisper does not have summoning sickness.

Steps

1. 1Activate Whisper by tapping it, sacrificing Corridor Monitor and any other creature you control, targeting any other creature card in your graveyard.
2. 2Ashnod the Uncaring triggers, copying Whisper's ability, targeting Corridor Monitor.
3. 3Resolve the copy of Whisper's ability, returning Corridor Monitor from your graveyard to the battlefield.
4. 4When Corridor Monitor enters the battlefield, it triggers, untapping Whisper.
5. 5Resolve the original Whisper ability, returning the targeted creature from your graveyard to the battlefield.
6. 6Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite recursion of creature cards in your graveyard