Effect Veiler [DREV-EN002] Ultra Rare Fiend when an opponent's monster activates

when an opponent's monster activates its effect (Quick Effect): You can detach 2 materials from this card

I'd have told you what it was

Set: Conspiracy Type: Creature — Ogre Shaman Rarity: Uncommon Cost: {3}{R} Dethrone (Whenever this creature attacks the player with the most life or tied for most life

{T}: Add {G} for each creature you control

• During your Main Phase 1: You can destroy all other cards on the field

Effect Veiler [DREV-EN002] Ultra Rare Fiend when an opponent's monster activatesSet: Duelist Revolution Card type: Tuner Monster Rarity: Ultra Rare Attack: 0 Defense: 0 During your opponent's Main Phase, you can send this card from your hand to the Graveyard to select 1 face up Effect Monster your opponent controls. Negate the effect(s) of that monster until the End Phase.