Ashnod's Altar + Intruder Alarm + Zul Ashur, Lich Lord

UB identity

Commander legal

The 3 combo pieces

What must be in place

You have a Zombie creature card in your graveyard.
Creatures you control can tap to produce enough mana to cast the Zombie in your graveyard minus at most {C}{C}.
Zul Ashur does not have summoning sickness.

How to execute it

  1. Activate Zul Ashur by tapping it, targeting a Zombie card in your graveyard.
  2. Activate any number of creatures you control by tapping them, adding enough mana to cast the Zombie.
  3. Cast the Zombie from your graveyard by paying its mana cost.
  4. When the Zombie enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Activate Ashnod's Altar by sacrificing the Zombie, adding {C}{C}.
  6. Repeat.

What the combo produces