Echoes of Eternity + Kozilek's Unsealing + Ulalek, Fused Atrocity

Mana needed: {C}{C} plus enough mana to pay for the Eldrazi spell

WUBRG identity

Commander legal

The 3 combo pieces

How to execute it

  1. Cast an Eldrazi with mana value 4, 5 or 6 from your hand by paying its mana cost.
  2. Ulalek and Kozilek's Unsealing's first ability trigger twice, the Eldrazi cast triggers twice if it has a cast ability, Echoes of Eternity triggers once if the Eldrazi cast was colorless.
  3. Resolve the first Ulalek's trigger, causing you to pay {C}{C} to copy the Eldrazi spell, Ulalek's trigger, both Kozilek's Unsealing triggers, both Eldrazi cast triggers if it had one, and the Echoes of Eternity trigger if it triggered.
  4. Resolve both Eldrazi cast triggers, if applicable.
  5. Resolve both Kozilek's Unsealing triggers, creating four 0/1 Eldrazi Spawn creature tokens.
  6. Holding priority, activate two Eldrazi Spawns by sacrificing them, adding {C}{C}.
  7. Resolve the copy of Ulalek's trigger from step 3, causing you to pay {C}{C} to copy the Eldrazi spell, Ulalek's trigger, both Kozilek's Unsealing triggers and any other abilities on the stack.
  8. Repeat from step 4.

What the combo produces