Skeleton Ship
Intruder Alarm
Hapatra, Vizier of Poisons

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Skeleton Ship without summoning sickness on the battlefield).

   Steps

How does this combo work?
1
Activate Skeleton Ship by tapping it, putting a -1/-1 counter on target creature.
2
Hapatra triggers, creating a creature token.
3
When the creature token enters, Intruder Alarm triggers, untapping all creatures.
4
Repeat.

   Results

What do I get from this combo?
Infinite -1/-1 counters
Infinite death triggers
Infinite ETB
Infinite LTB
Infinite mana creatures you control can produce
Infinite untap of all creatures
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