"Mage" Caster of Black

【CONT】 All of your other 《Master》 or《Servant》 characters or characters with "Keter Malkuth(叡智)" in its card name get +500 power.【AUTO】 [Put this card face up underneath a card in battle as a marker] When your other card named "Golem Keter Malkuth" becomes 【REVERSE】 in battle, if this card is on your back stage, you may pay the cost. If you do, 【REST】 that character.