Weaver of Lies is a rare Creature — Beast card from Legions (LGN), collector number 57. Current market price: $0.34 (foil $7.94), TCGplayer market prices via Scryfall.
Morph {4}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, turn any number of target creatures with morph abilities other than this creature face down.