Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite storm countInfinite untap of creaturesInfinite mana creatures you control can produce
How it works
Activate Zul Ashur by tapping it, targeting a Zombie card in your graveyard.
Activate any number of creatures you control by tapping them, adding enough mana to cast the Zombie.
Cast the Zombie from your graveyard by paying its mana cost.
When the Zombie enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Activate Yahenni by sacrificing the Zombie.
Repeat.
This brilliant loop turns your graveyard into an endless assembly line by letting Zul Ashur, Lich Lord repeatedly pull a Zombie back into play. Every time that Zombie enters the battlefield, Intruder Alarm triggers to untap all your creatures—including any mana-producers you tapped to pay for the spell. You can then use Yahenni, Undying Partisan to sacrifice that creature for safety (and a growing power boost), triggering the Alarm's untap effect all over again to keep the cycle spinning infinitely.