Otherworldly Escort
Amoeboid Changeling
Intruder Alarm
Umbral Collar Zealot

   Prerequisites

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

   Steps

How does this combo work?
1
Activate Amoeboid Changeling's second ability by tapping it, causing Otherworldly Escort to lose all creature types until end of turn.
2
Activate Umbral Collar Zealot by sacrificing Otherworldly Escort.
3
When Otherworldly Escort dies, it triggers, returning itself from your graveyard to the battlefield as a Spirit Detective.
4
When Otherworldly Escort enters, Intruder Alarm triggers, untapping all creatures.
5
Resolve the Umbral Collar Zealot ability.
6
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite mana creatures you control can produce
Infinite untap of creatures
Infinite surveil
Infinite untap of creatures you control
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