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

Color identity: UB
Mana cost: 
Steps:
  1. Activate a creature you control by tapping it, adding {B}.
  2. Activate Ghoulcaller Giser by paying {B}, sacrificing a creature and tapping it, creating at least one 2/2 Zombie creature token.
  3. The Zombie token(s) enter the battlefield, triggering Intruder Alarm that many times, untapping all creatures.
  4. 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
  - Gisa does not have summoning sickness.
  - You control a creature that can tap to produce at least {B}.
  - You control at least one additional creature.
[END OF COMBO PREREQUISITES]
assistant