Anti-Venom, Horrifying Healer + Agatha's Soul Cauldron + Walking Ballista + The Rollercrusher Ride

Anti-Venom, Horrifying Healer

Agatha's Soul Cauldron

Walking Ballista

The Rollercrusher Ride

How it works

1. Activate Anti-Venom using Walking Ballista's ability by removing a +1/+1 counter from it, targeting itself and putting two +1/+1 counters on it due to its replacement effect and The Rollercrusher Ride.
2. Activate Anti-Venom using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
3. Repeat.

By exiling Walking Ballista into Agatha's Soul Cauldron and using its counter-removal ability, you grant Anti-Venom, Horrifying Healer the power to ping targets while growing in size. The Rollercrusher Ride supercharges this loop: its delirium ability doubles the damage Anti-Venom deals to itself, creating a surplus of +1/+1 counters that fuels an infinite number of activations.