Balduvian Hydra is a rare Creature — Hydra card from Ice Age (ICE), collector number 173. Current market price: $1.17, TCGplayer market prices via Scryfall.
This creature enters with X +1/+0 counters on it. Remove a +1/+0 counter from this creature: Prevent the next 1 damage that would be dealt to it this turn. {R}{R}{R}: Put a +1/+0 counter on this creature. Activate only during your upkeep.