Birgi, God of Storytelling // Harnfel, Horn of Bounty + Corridor Monitor + Retraction Helix + Urza, Lord High Artificer

Mana needed: {U}{U}

UR identity

Commander legal

The 4 combo pieces

How to execute it

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

What the combo produces