Ghostrick Nekomusume

[ Spellcaster / Effect ] Cannot be Normal Summoned, unless you control a "Ghostrick" monster. Once per turn: You can change this card to face-down Defense Position. When a Level 4 or higher monster(s) is Normal or Special Summoned: Change that monster(s) to face-down Defense Position. There must be another "Ghostrick" monster on the field to activate and to resolve this effect. ATK/ 400 DEF/ 900