Infinite death triggersInfinite creature ETBInfinite creature LTBInfinite mana creatures you control can produceInfinite millInfinite creature sacrifice triggersInfinite scry 1Infinite self-millInfinite untap of creatures
How it works
Activate Viscera Seer by sacrificing Geralf's Mindcrusher.
Geralf's Mindcrusher dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
Geralf's Mindcrusher enters the battlefield, triggering itself and Intruder Alarm.
Resolve the Geralf's Mindcrusher trigger, causing target player to mill five cards.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Viscera Seer ability from step 1, causing you to scry 1.
Activate Skeleton Ship by tapping it, putting a -1/-1 counter on Geralf's Mindcrusher.