All 'Charmer' monsters you control cannot be destroyed by battle. If a 'Familiar-Possessed' monster attacks an opponent's monster, it gains 800 ATK during damage calculation only. If a monster(s) you control is destroyed by battle or card effect: You can Special Summon from your Deck in Attack Position or face-down Defense Position, 1 Spellcaster-Type monster with 1500 DEF that has a different Attribute from that destroyed monster. You can only use this effect of 'Possession Release' once per turn.