Ashnod the Uncaring, Whisper, Blood Liturgist, and Intruder Alarm

Prerequisites

• Ashnod the Uncaring on the battlefield
• Whisper, Blood Liturgist on the battlefield
• Intruder Alarm on the battlefield
• Whisper does not have summoning sickness
• You control at least two additional nontoken creatures
• You have at least two creature cards in your graveyard

Steps

1. Activate Whisper by tapping it and sacrificing two other creatures you control, targeting any creature card in your graveyard
2. Ashnod triggers, copying Whisper's ability, targeting another creature card in your graveyard
3. Resolve the first Whisper ability, returning a creature card from your graveyard to the battlefield
4. The creature enters the battlefield, triggering Intruder Alarm, untapping all creatures
5. Repeat from step 3 one additional time
6. Repeat from step 1

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of all creatures