Koa'ki Meiru Maximus [SOVR-EN081] Ultimate Rare G-30 you can negate the activation

you can negate the activation and effect of any Spell Cards and destroy them

If you negate an effect this way

Set: Black & White: Plasma Storm Type: Item Rarity: Rare Ace

Set: Astral Pack 7 Card type: Spell Card Rarity: Super Rare Change all face-up Level 4 or higher monsters to Defense Position

Set: POP Series 2 Type: Psychic Rarity: Ultra Rare Retreat cost: 1

Koa'ki Meiru Maximus [SOVR-EN081] Ultimate Rare G-30 you can negate the activationSet: Stardust Overdrive Card type: Effect Monster Rarity: Ultimate Rare Attack: 3000 Defense: 2500 This card cannot be Normal Summoned or Set. This card can only be Special Summoned by removing from play 1 "Iron Core" of Koa'ki Meiru from your hand. During each of your End Phase destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" or 1 "Koa'ki Meiru" monster from your hand to the Graveyard. Once per turn, during your Main Phase, you can