Dystopia the Despondent [JUMP-EN075] Ultra Rare Light destroy them

destroy them

Set: Dark Beginning 1 Card type: Equip Spell Rarity: Super Rare Attack: 0 Defense: 0 Pay 800 Life Points

the ATK/DEF of those changed monsters become 0

and if you do

Dystopia the Despondent [JUMP-EN075] Ultra Rare Light destroy themSet: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Attack: 5000 Defense: 5000 Cannot be Normal Summoned Set. Must be Special Summoned (from your hand or Graveyard) by sending 4 face up Level 1 monsters you control to the Graveyard, and cannot be Special Summoned by other ways. Other monsters you control cannot attack. During either player's Battle Step, once per battle involving this card: You can banish 1 Level 1 monster