Cactarantula is a common Creature — Plant Spider card from Outlaws of Thunder Junction (OTJ), collector number 158. Current market price: $0.11 (foil $0.15), TCGplayer market prices via Scryfall.
This spell costs {1} less to cast if you control a Desert. Reach Whenever this creature becomes the target of a spell or ability an opponent controls, you may draw a card.