Spawnsire of Ulamog, Thornbite Staff, and Yurlok of Scorch Thrash

Prerequisites

• Spawnsire of Ulamog on the battlefield
• Thornbite Staff on the battlefield
• Yurlok of Scorch Thrash on the battlefield
• Thornbite Staff attached to Yurlok
• Yurlok does not have summoning sickness
• available

Steps

1. Activate Yurlok by paying and tapping it, causing each player to add
2. Activate Spawnsire of Ulamog's first ability by paying , creating two 0/1 Eldrazi Spawn creature tokens
3. Activate the Eldrazi Spawns by sacrificing them, adding
4. When the Eldrazi Spawns die, Yurlok triggers, untapping itself
5. Repeat an arbitrarily large number of times
6. Move to your next phase, causing each opponent to lose an amount of life equal to the mana in their mana pool

Results

• Infinite black mana for opponents
• Infinite death triggers
• Infinite ETB
• Infinite green mana for opponents
• Infinite lifeloss
• Infinite LTB
• Infinite red mana for opponents
• Infinite sacrifice triggers