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

Color identity: BGU
Mana cost: 
Steps:
  1. Activate Xavier Sal's first ability by tapping it and removing a counter from a permanent you control, creating a copy of any creature token you control.
  2. When the creature token enters the battlefield, Intruder Alarm and Cloakwood Swarmkeeper trigger.
  3. Resolve the Intruder Alarm trigger, untapping all creatures.
  4. Resolve the Cloakwood Swarmkeeper trigger, putting a +1/+1 counter on it.
  5. 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
  - There is at least one counter on a permanent you control.
  - You control at least one creature token.
[END OF COMBO PREREQUISITES]
assistant