Altar of Dementia + Cathars' Crusade + Cauldron of Souls + Corridor Monitor

WU identity

Commander legal

The 4 combo pieces

What must be in place

Corridor Monitor does not have a -1/-1 counter on it.

How to execute it

  1. Activate Cauldron of Souls by tapping it, giving Corridor Monitor persist until end of turn.
  2. Activate Altar of Dementia by sacrificing Corridor Monitor.
  3. When Corridor Monitor dies, its persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
  4. When Corridor Monitor enters the battlefield, it and Cathars' Crusade trigger.
  5. Resolve the Corridor Monitor trigger, untapping Cauldron of Souls.
  6. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control.
  7. Resolve the Altar of Dementia ability from step 2, causing target player to mill cards equal to Corridor Monitor's power.
  8. Repeat.

What the combo produces