Nessian Asp is a common Creature — Snake card from Duel Decks: Elspeth vs. Kiora (DDO), collector number 48. Current market price: $0.23, TCGplayer market prices via Scryfall.
Reach {6}{G}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)