Destroy each creature that enters the battlefield under an opponent's control, Destroy all creatures opponents control, Lock
Give Shay Cormac deathtouch, if needed.
Activate Shay Cormac using Walking Ballista's second ability by removing a +1/+1 counter from it, targeting a creature an opponent controls.
Shay Cormac's first ability triggers, putting a bounty counter on the targeted creature.
Resolve the Shay Cormac ability from step 2, dealing 1 damage to the creature and killing it due to Shay Cormac's deathtouch.
When the creature dies, Shay Cormac's second ability triggers, putting two +1/+1 counters on it.
Repeat
Component Cards
How It Works
Give Shay Cormac deathtouch, if needed.
Activate Shay Cormac using Walking Ballista's second ability by removing a +1/+1 counter from it, targeting a creature an opponent controls.
Shay Cormac's first ability triggers, putting a bounty counter on the targeted creature.
Resolve the Shay Cormac ability from step 2, dealing 1 damage to the creature and killing it due to Shay Cormac's deathtouch.
When the creature dies, Shay Cormac's second ability triggers, putting two +1/+1 counters on it.
Repeat from step 2.
If the method giving Shay Cormac deathtouch lasts indefinitely, you may repeat this loop whenever a creature enters the battlefield under an opponent's control.