Hydra's Growth is a uncommon Enchantment — Aura card from Jumpstart 2022 (J22), collector number 89. Current market price: $2.98, TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, put a +1/+1 counter on enchanted creature. At the beginning of your upkeep, double the number of +1/+1 counters on enchanted creature.