Mirror Force (Purple) [DL15-EN018] Rare Equipment which was Summoned this way

which was Summoned this way

the effects of all face-up monsters your opponent controls are negated

Look at your opponent''s hand

Set: Welcome to Rathe Unlimited Edition: Unlimited Finish: Rainbow Foil Type: Equipment Subtype: Arms Rarity: Legendary Class: Warrior Once per Turn Action - [1 Resource]: Your next weapon attack this turn gains +1 [Power]

If the discarded card was a Monster Card

Mirror Force (Purple) [DL15-EN018] Rare Equipment which was Summoned this waySet: Duelist League Promo Card type: Normal Trap Rarity: Rare When an opponent's monster declares an attack: Destroy all Attack Position monsters your opponent controls.