Expurrely Happiness

2 Level 7 monsters
You can also Xyz Summon this card by using a Rank 2 monster you control with 5 or more materials. (Transfer its materials to this card.) During your Main Phase: You can detach 1 material from this card, and if you do, negate the effects of all face-up monsters your opponent currently controls, until the end of this turn. Your opponent cannot activate cards or effects in response to this effect's activation if this card has a Level 1 "Purrely" monster as material. When an attack is declared involving this card that has 5 or more materials: Inflict 1500 damage to your opponent.