Masked HERO Blast [JUMP-EN078] Ultra Rare Advent Calendar 2018 but change its ATK/DEF to

but change its ATK/DEF to 0

This card cannot be targeted by the effects of Spells

its ATK becomes half its current ATK

send as many cards in both players' hands and on the field as possible to the GY

and send 1 monster your opponent controls to the Graveyard

Masked HERO Blast [JUMP-EN078] Ultra Rare Advent Calendar 2018 but change its ATK/DEF toSet: Shonen Jump Magazine Promos Card type: Fusion Effect Monster Rarity: Ultra Rare Attack: 2200 Defense: 1800 Must be Special Summoned with "Mask Change" and cannot be Special Summoned by other ways. If this card is Special Summoned: You can target 1 face up monster your opponent controls; its ATK becomes half its current ATK. Once per turn, during either player's turn: You can pay 500 LP, then target 1 Spell Trap Card your opponent controls; return