How can you create a combo with Yurlok of Scorch Thrash, Thornbite Staff, Spawnsire of Ulamog?
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[START OF COMBO]This combo can be formed with Yurlok of Scorch Thrash, Thornbite Staff, Spawnsire of Ulamog

Color identity: BRG
Mana cost: {2}
Steps:
  1. Activate Yurlok by paying {1} and tapping it, causing each player to add {B}{R}{G}.
  2. Activate Spawnsire of Ulamog's first ability by paying {4}, creating two 0/1 Eldrazi Spawn creature tokens.
  3. Activate the Eldrazi Spawns by sacrificing them, adding {C}{C}.
  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.[END OF COMBO STEPS]

Result:
  - Infinite black mana for opponents
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite green mana for opponents
  - Infinite lifeloss
  - Infinite leaves the battlefield
  - Infinite red mana for opponents
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Thornbite Staff attached to Yurlok.
  - Yurlok does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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