Bellowing Aegisaur, Scurry Oak, and Pandemonium

Prerequisites

• Bellowing Aegisaur on the battlefield
• Scurry Oak on the battlefield
• Pandemonium on the battlefield
• You have a way to give Bellowing Aegisaur indestructible
• You have a way to deal damage to Bellowing Aegisaur

Steps

1. Give Bellowing Aegisaur indestructible by any method
2. Deal damage to Bellowing Aegisaur
3. Bellowing Aegisaur triggers, putting a +1/+1 counter on each other creature you control
4. Scurry Oak triggers, creating a 1/1 Squirrel creature token
5. The Squirrel enters the battlefield, triggering Pandemonium, dealing 1 damage to Bellowing Aegisaur
6. Repeat from step 3

Results

• Infinite +1/+1 counters on all creatures you control except Bellowing Aegisaur
• Infinite creature tokens
• Infinite ETB