Genesis Hydra is a rare Creature — Plant Hydra card from Outlaws of Thunder Junction Commander (OTC), collector number 193. Current market price: $0.42, TCGplayer market prices via Scryfall.
When you cast this spell, reveal the top X cards of your library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield. Then shuffle the rest into your library. This creature enters with X +1/+1 counters on it.