Kaust, Eyes of the Glade is a mythic Legendary Creature — Dryad Detective card from Murders at Karlov Manor Commander (MKC), collector number 314. Current market price: $0.29 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever a creature you control that was turned face up this turn deals combat damage to a player, draw a card. {T}: Turn target face-down attacking creature you control face up.