Displacer Kitten + Intruder Alarm + Mourning

UB identity

Commander legal

The 3 combo pieces

What must be in place

Creatures you control can tap to produce at least {1}{B}{B}.

How to execute it

  1. Activate any number of creatures you control by tapping them, adding at least {1}{B}{B}.
  2. Cast Mourning by paying its mana cost, targeting any creature you control except Displacer Kitten.
  3. Displacer Kitten triggers, blinking itself.
  4. When Displacer Kitten enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Resolve the Mourning spell.
  6. Activate Mourning by paying {B}, returning it from the battlefield to your hand.
  7. Repeat.

What the combo produces