Kozmo Dark Eclipser [BOSH-EN085] Secret Rare Normal Trap destroy all monsters your opponent

destroy all monsters your opponent controls

and only once that turn

Set: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Attack: 300 Defense: 300 When this card is sent to the Graveyard

also it cannot be destroyed by battle

You can only use this effect of "Darklord Nasten" once per turn

Kozmo Dark Eclipser [BOSH-EN085] Secret Rare Normal Trap destroy all monsters your opponentSet: Breakers of Shadow Card type: Effect Monster Rarity: Secret Rare Attack: 3000 Defense: 2600 Cannot be targeted by an opponent's card effects. During either player's turn, when a Trap Card is activated: You can banish 1 "Kozmo" monster from your Graveyard; negate the activation, and if you do, destroy that card. If this card is destroyed by battle or card effect and sent to the Graveyard: You can banish this card from your Graveyard; add 1 Level 8