Deepwood Legate is a uncommon Creature — Shade card from Mercadian Masques (MMQ), collector number 132. Current market price: $0.13 (foil $9.22), TCGplayer market prices via Scryfall.
If an opponent controls a Forest and you control a Swamp, you may cast this spell without paying its mana cost. {B}: This creature gets +1/+1 until end of turn.