How can you create a combo with Xavier Sal, Infested Captain, Intruder Alarm, Bloodspore Thrinax?
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[START OF COMBO]This combo can be formed with Xavier Sal, Infested Captain, Intruder Alarm, Bloodspore Thrinax

Color identity: BGU
Mana cost: 
Steps:
  1. Activate Xavier Sal's first ability by removing a counter from a permanent you control, creating a copy of a creature token you control that enters the battlefield with a +1/+1 counter on it due to Bloodspore Thrinax.
  2. When the creature token enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  3. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite mana creatures you control can produce
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Xavier Sal does not have summoning sickness.
  - You control at least one nonlegendary creature token.
  - Bloodspore Thrinax has at least one +1/+1 counter on it.
  - There is at least one counter on a permanent you control excluding the first counter on Bloodspore Thrinax.
[END OF COMBO PREREQUISITES]
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