Amoeboid Changeling + Ashnod's Altar + Intruder Alarm + Valkyrie's Call

WU identity

Commander legal

The 4 combo pieces

What must be in place

You control another nontoken creature.

How to execute it

  1. Activate Amoeboid Changeling's second ability by tapping it, causing another nontoken creature you control to lose all creature types until end of turn.
  2. Activate Ashnod's Altar by sacrificing the creature targeted in step 1, adding {C}{C}.
  3. When the creature dies, Valkyrie's Call triggers, returning the creature from your graveyard to the battlefield as a white Angel.
  4. When the creature enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Repeat.

What the combo produces