Infinite death triggersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creaturesPut all creature cards from your library onto the battlefield
How it works
Activate Atla by paying 2 and tapping it, creating a 0/1 Egg creature token.
The Egg enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Activate Ashnod's Altar by sacrificing the Egg, adding CC.
The Egg dies, triggering Atla, causing you to reveal cards from the top of your library until you reveal a creature card, then put the creature card onto the battlefield and all other revealed cards on the bottom of your library.
The creature enters the battlefield, triggering Intruder Alarm, untapping all creatures.