Knowledge Vault [Legends] SWSH102 When Illusions of Grandeur enters

When Illusions of Grandeur enters the battlefield

"Your first mistake was thinking I would let you live long enough to make a second

Whenever Narset

and inflict damage to your opponent equal to the ATK lost by that monster because of this effect

you can destroy 1 face-up card your opponent control

Knowledge Vault [Legends] SWSH102 When Illusions of Grandeur entersSet: Legends Type: Artifact Rarity: Rare Cost: {4} {2}, {T}: Exile the top card of your library face down. {0}: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled with Knowledge Vault into their owner's hand. When Knowledge Vault leaves the battlefield, put all cards exiled with Knowledge Vault into their owner's graveyard.