How can you create a combo with Skeleton Ship, Intruder Alarm, Geralf's Mindcrusher, Viscera Seer?
user
[START OF COMBO]This combo can be formed with Skeleton Ship, Intruder Alarm, Geralf's Mindcrusher, Viscera Seer

Color identity: UB
Mana cost: 
Steps:
  1. Activate Viscera Seer by sacrificing Geralf's Mindcrusher.
  2. Geralf's Mindcrusher dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. Geralf's Mindcrusher enters the battlefield, triggering itself and Intruder Alarm.
  4. Resolve the Geralf's Mindcrusher trigger, causing target player to mill five cards.
  5. Resolve the Intruder Alarm trigger, untapping all creatures.
  6. Resolve the Viscera Seer ability from step 1, causing you to scry 1.
  7. Activate Skeleton Ship by tapping it, putting a -1/-1 counter on Geralf's Mindcrusher.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana creatures you control can produce
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite scry 1
  - Infinite self-mill
  - Infinite untap of all creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Skeleton Ship does not have summoning sickness.
  - Geralf's Mindcrusher does not have a +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
assistant