How can you create a combo with Intruder Alarm, Thraben Doomsayer?
user
[START OF COMBO]This combo can be formed with Intruder Alarm, Thraben Doomsayer

Color identity: WU
Mana cost: 
Steps:
  1. Activate Thraben Doomsayer by tapping it, creating a 1/1 Human token.
  2. Human token enters the battlefield, triggering Intruder Alarm, untapping all creatures.
  3. Repeat[END OF COMBO STEPS]

Result:
  - Infinite creature tokens
  - Infinite enters the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Thraben Doomsayer does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant