Ulalek, Fused Atrocity + Echoes of Eternity + Kozilek's Unsealing + Eldrazi Creature Card with MV=4, 5 or 6

Prerequisites

• Eldrazi Creature Card with MV=4, 5 or 6

Steps

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

Effects

• Infinite colorless mana
• Infinite copies of a specific creature
• Infinite copies of abilities you control on the stack
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers