Corridor Monitor + Hamza, Guardian of Arashin + Retraction Helix + Urza, Lord High Artificer

Mana needed: {U}{U}

GWU identity

Commander legal

The 4 combo pieces

What must be in place

You control a creature that has at least one +1/+1 counter on it.

How to execute it

  1. Cast Retraction Helix by paying {U}, targeting a creature you control that doesn't have summoning sickness.
  2. Cast Corridor Monitor by paying {U} due to Hamza.
  3. When Corridor Monitor enters, it triggers, untapping the creature targeted by Retraction Helix.
  4. Activate Urza's first ability by tapping Corridor Monitor, adding {U}.
  5. Activate the creature targeted by Retraction Helix by tapping it, returning Corridor Monitor from the battlefield to your hand.
  6. Repeat from step 2.

What the combo produces