Animation Module
Intruder Alarm
Cathars' Crusade

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Creatures you control can tap to produce at least 1. You have a way to cause a creature to enter the battlefield without a -1/-1 counter on it.

   Steps

How does this combo work?
1
Cause a creature to enter the battlefield.
2
Intruder Alarm and Cathars' Crusade trigger.
3
Resolve the Intruder Alarm trigger, untapping all creatures.
4
Holding priority, activate a mana-producing creature by tapping it, adding at least 1.
5
Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control.
6
Animation Module triggers for each counter placed this way.
7
Resolve all but one Animation Module trigger, choosing not to pay.
8
Resolve the final Animation Module trigger, causing you to create a 1/1 Servo artifact creature token.
9
Repeat from step 2.

   Results

What do I get from this combo?
Infinite creature tokens
Infinite ETB
Infinite mana creatures you control can produce
Infinite untap of creatures
Infinite untap of creatures you control
Infinite +1/+1 counters on most creatures you control
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