Molten Hydra is a rare Creature — Hydra card from Urza's Legacy (ULG), collector number 85. Current market price: $0.43 (foil $7.70), TCGplayer market prices via Scryfall.
{1}{R}{R}: Put a +1/+1 counter on this creature. {T}, Remove all +1/+1 counters from this creature: It deals damage to any target equal to the number of +1/+1 counters removed this way.