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

Prerequisites

• Zul Ashur, Lich Lord on the battlefield
• Intruder Alarm on the battlefield
• Ashnod's Altar on the battlefield
• 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
• Zul Ashur does not have summoning sickness

Steps

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
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite storm count
• Infinite untap of all creatures
• Infinite mana creatures you control can produce