Bioessence Hydra is a rare Creature — Hydra Mutant card from War of the Spark Promos (PWAR), collector number 186s. Current market price: — (foil $1.19), TCGplayer market prices via Scryfall.
Trample This creature enters with a +1/+1 counter on it for each loyalty counter on planeswalkers you control. Whenever one or more loyalty counters are put on planeswalkers you control, put that many +1/+1 counters on this creature.