Hungering Hydra is a rare Creature — Hydra card from Core Set 2019 (M19), collector number 189. Current market price: $3.00 (foil $5.54), TCGplayer market prices via Scryfall.
This creature enters with X +1/+1 counters on it. This creature can't be blocked by more than one creature. Whenever this creature is dealt damage, put that many +1/+1 counters on it. (It must survive the damage to get the counters.)