Dual Casting + Mythos of Illuna + Retreat to Coralhelm

Mana needed: {2}{U}{U}

GUR identity

Commander legal

The 3 combo pieces

What must be in place

Dual Casting attached to a creature that does not have summoning sickness.
You control at least one basic Mountain.

How to execute it

  1. Cast Mythos of Illuna by paying {2}{U}{U}, targeting any permanent.
  2. Holding priority, activate any Mountain you control by tapping it, adding {R}.
  3. Activate the creature with Dual Casting attached by paying {R} and tapping it, creating a copy of Mythos of Illuna targeting any basic Mountain you control.
  4. Resolve the Mythos of Illuna copy, creating a token copy of the basic Mountain.
  5. The basic Mountain token enters the battlefield, triggering Retreat to Coralhelm, untapping the creature with Dual Casting attached.
  6. Repeat from step 2.

What the combo produces