Eternal Witness + Mythos of Illuna + Radiate

Mana needed: {5}{U}{U}{R}{R}

GUR identity

Commander legal

The 3 combo pieces

What must be in place

There are permanents on the battlefield that enter the battlefield untapped and produce at least {3}{R}{R}.

How to execute it

  1. Cast Mythos of Illuna targeting anything but Eternal Witness, holding priority, and then cast Radiate targeting Mythos of Illuna.
  2. When Radiate resolves you will have Mythos copies targeting every targetable permanent (except what the original Mythos card is targeting).
  3. When each of the copies resolve, target Radiate in your graveyard with the new Eternal Witness token's ability and return Radiate to your hand.
  4. Before the original Mythos of Illuna card resolves, cast Radiate again targeting Mythos by spending mana from the tokens you just created.
  5. Repeat this process, effectively doubling the number of copies created, allowing you to return Radiate and another card with two Witness triggers.
  6. Repeat.

What the combo produces