Prerequisites
- All permanents on the battlefield
- Walking Ballista has at least two +1/+1 counters on it
- Walking Ballista does not have summoning sickness
Steps
- Declare Walking Ballista as an attacker
- Activate Walking Ballista's second ability by removing a +1/+1 counter from it, dealing 1 damage to target opponent
- Vraska triggers, putting a +1/+1 counter on Walking Ballista
- Repeat from step 2
Results
Required Cards 3
Vraska, Swarm's Eminence
Legendary Planeswalker — Vraska
Walking Ballista
Artifact Creature — Construct
Ohran Frostfang
Snow Creature — Snake