Vigor + Walking Ballista + Gratuitous Violence

Vigor

Walking Ballista

Gratuitous Violence

How it works

1. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, putting two +1/+1 counters on it due to Vigor.
2. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, dealing 2 damage to any target.
3. Repeat as desired.

This potent engine relies on Gratuitous Violence to double every sliver of damage your creatures dish out, which is the key to turning Walking Ballista's pings into an explosive feedback loop. By removing a counter from Walking Ballista to ping Vigor instead, Vigor's replacement effect steps in to not only prevent that damage entirely, but supersize it by showering the target with twice as many +1/+1 counters as the original blow. Thanks to Gratuitous Violence doubling the prevented damage value, this interaction lets Walking Ballista grow its counter supply exponentially rather than shrinking, netting a surplus that translates directly into infinite damage to any target and an unbounded number of counters on your creatures.