Berta, Wise Extrapolator + Intruder Alarm + Cathars' Crusade

Prerequisites

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Steps

1. 1Activate Berta by paying and tapping it, creating a 0/0 Fractal creature token and putting a +1/+1 counter on it.
2. 2When the Fractal enters, Intruder Alarm and Cathars' Crusade trigger.
3. 3Resolve the Intruder Alarm trigger, untapping all creatures.
4. 4Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control.
5. 5Berta triggers, adding .
6. 6Repeat.

Effects

• Infinite +1/+1 counters on creatures you control
• Infinite creature ETB
• Infinite creature tokens
• Infinite mana creatures you control can produce
• Infinite untap of creatures