Ultimate Dragon of Pride and Soul

3 monsters with 2500 original ATK and DEF
Your opponent cannot target this Fusion Summoned card with card effects, also it cannot be destroyed by their card effects. This Fusion Summoned card gains 4500 ATK/DEF while you have 25 or more cards in your GY. Once per turn, if your opponent has 25 or more cards in their GY: You can destroy all cards they control.