Awakening of the Possessed

“Monsters you control gain 300 ATK for each different Attribute you control. "Charmer" and "Familiar-Possessed" monsters you control cannot be destroyed by card effects. If a Spellcaster monster(s) with 1850 original ATK is Normal or Special Summoned to your field: Draw 1 card. You can only use this effect of "Awakening of the Possessed" once per turn.”