Cauldron Familiar + Witch's Oven + Intruder Alarm + Karn, Silver Golem
Cauldron Familiar
Witch's Oven
Intruder Alarm
Karn, Silver Golem
Requires
Cauldron Familiar must be on the battlefield.
Witch's Oven must be on the battlefield.
Intruder Alarm must be on the battlefield.
Karn, Silver Golem must be on the battlefield.
Witch's Oven does not have summoning sickness.
Mana needed: 
Steps
- Activate Karn by paying , causing Witch's Oven to become an artifact creature until end of turn.
- Activate Witch's Oven by tapping it and sacrificing Cauldron Familiar, creating a Food token.
- Activate Cauldron Familiar by sacrificing a Food token, returning it from your graveyard to the battlefield.
- Cauldron Familar enters the battlefield, triggering Intruder Alarm, untapping all creatures.
- Repeat from step 2.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mana creatures you control can produce. Infinite sacrifice triggers. Infinite untap of all creatures.
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