Archlord Zerato (AST-034) - Ancient Sanctuary Unlimited

This card cannot be Normal Summoned or Set. This card cannot be Special Summoned except by offering 1 face-up Warrior of Zera on your side of the field as a Tribute while The Sanctuary in the Sky is on the field. If The Sanctuary in the Sky is on your side of the field, discard 1 LIGHT Monster Card from your hand to the Graveyard to destroy all monsters on your opponent''s side of the field.