Heavy Arbalest + Intruder Alarm + Nested Ghoul

UB identity

Commander legal

The 3 combo pieces

What must be in place

Heavy Arbalest attached to Nested Ghoul.
Nested Ghoul does not have summoning sickness.
You have a way to give Nested Ghoul indestructible.

How to execute it

  1. Give Nested Ghoul indestructible, if needed.
  2. Activate Nested Ghoul by tapping it, dealing 2 damage to itself.
  3. Nested Ghoul triggers, creating a 2/2 Phyrexian Zombie creature token.
  4. When the Phyrexian Zombie enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Repeat from step 2.

What the combo produces