Apocalypse Hydra is a mythic Creature — Hydra card from Conflux (CON), collector number 98. Current market price: $1.05 (foil $5.78), TCGplayer market prices via Scryfall.
This creature enters with X +1/+1 counters on it. If X is 5 or more, it enters with an additional X +1/+1 counters on it. {1}{R}, Remove a +1/+1 counter from this creature: It deals 1 damage to any target.