Missy + Skirk Alarmist + Intruder Alarm + Altar of Dementia

Prerequisites

• You control another nontoken nonartifact creature.

Steps

1. 1Activate Altar of Dementia by sacrificing another nontoken nonartifact creature When the creature dies, Missy's first ability triggers, returning the creature from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
2. 2When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
3. 3Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to the sacrificed creature's power.
4. 4Activate Skirk Alarmist by tapping it, turning the creature face up.
5. 5Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite mill
• Infinite self-mill
• Infinite untap of creatures