Bellowing Aegisaur + Walking Ballista

Prerequisites

• Walking Ballista has at least two +1/+1 counters.
• You have a way to give Bellowing Aegisaur indestructible.

Steps

1. 1Give Bellowing Aegisaur indestructible by any method.
2. 2Activate Walking Ballisata by removing a +1/+1 counter from it, dealing 1 damage to Bellowing Aegisaur.
3. 3Bellowing Aegisaur triggers, putting a +1/+1 counter on each other creature you control.
4. 4Repeat from step 2.

Effects

• Infinite +1/+1 counters on most creatures you control