Ulalek, Fused Atrocity, Annie Joins Up, and Kozilek's Unsealing

Prerequisites

• Ulalek, Fused Atrocity on the battlefield
• Annie Joins Up on the battlefield
• Kozilek's Unsealing on the battlefield
• plus enough mana to pay for the Eldrazi spell available

Steps

1. Cast an Eldrazi with mana value 4, 5 or 6 from your hand by paying its mana cost
2. Ulalek triggers twice, and Kozilek's Unsealing's first ability triggers once
3. The Eldrazi cast also triggers if it has a cast ability
4. Resolve the first Ulalek's trigger, causing you to pay to copy the Eldrazi spell, Ulalek's trigger, Kozilek's Unsealing's trigger, and the Eldrazi cast trigger if it had one
5. Resolve the Eldrazi cast trigger, if applicable
6. Resolve the Kozilek's Unsealing trigger, creating two 0/1 Eldrazi Spawn creature tokens
7. Holding priority, activate the two Eldrazi Spawns by sacrificing them, adding
8. Resolve the copy of Ulalek's trigger from step 3, causing you to pay to copy the Eldrazi spell, Ulalek's trigger, Kozilek's Unsealing's trigger, and the Eldrazi cast trigger if it had one
9. Repeat from step 4

Results

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