Weaver of Lies

Creature - Beast 4/4, 5UU (7)
Morph {4}{U} (You may cast this face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Weaver of Lies is turned face up, turn any number of target creatures with morph other than Weaver of Lies face down.¹
Illus. Luca Zontini

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: The trigger occurs when you use the Morph ability to turn the card face up, or when an effect turns it face up. It will not trigger on being revealed or on leaving the battlefield.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Legions (Rare)