Prerequisites
- All permanents on the battlefield
- Walking Ballista has at least one +1/+1 counter on it
Steps
- Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to Bellowing Aegisaur
- Bellowing Aegisaur triggers, putting a +1/+1 counter on each other creature you control
- Repeat
Results
Required Cards 3
Bellowing Aegisaur
Creature — Dinosaur
Walking Ballista
Artifact Creature — Construct