"Core Set 2019", +~X (2)
Banefire deals X damage to any target.
If X is 5 or more, this spell can't be countered and the damage can't be prevented.
Hungering Hydra enters with X +1/+1 counters on it.
Hungering Hydra can't be blocked by more than one creature.
Whenever Hungering Hydra is dealt damage, put that many +1/+1 counters on it. (It must survive the damage to get the counters.)
Gatherer works better in the Companion app!