Infinite damageInfinite +1/+1 counters on a creature
How it works
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 Loading Zone.
Activate Anti-Venom using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
Repeat.
This loop transforms your creatures into a self-sustaining engine by utilizing Agatha's Soul Cauldron to grant Walking Ballista's activated abilities to anything bearing a +1/+1 counter. Loading Zone ensures this growth goes exponential, doubling every counter placed so that self-inflicted damage to Anti-Venom, Horrifying Healer generates a net surplus of growth. With those amplified counters constantly fueling Walking Ballista's lethal reach, you can effortlessly ping your opponents to death while growing your board infinitely.