Ruina de los vivos

Text:

Metamorfosis . (Puedes lanzar esta carta boca abajo como una criatura 2/2 pagando . Ponla boca arriba en cualquier momento pagando su coste de metamorfosis.)
Cuando Ruina de los vivos se pone boca arriba, todas las criaturas obtienen -X/-X hasta el final del turno.

Rulings:

• 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.
• 10/4/2004 The X in the ability has the same value as the X paid in the Morph ability. This is pretty easy to derive since there is no other source of X.