Knowledge Vault [Legends] RC12 this card cannot be selected

this card cannot be selected as an attack target

Negate the activation of a Spell/Trap Card/ Normal Summon/ Flip Summon/ Special Summon and destroy the Spell Card

Set: Dark Revelation Volume 4 Card type: Effect Monster Rarity: Ultra Rare Attack: 2300 Defense: 1400 If this card is discarded to the Graveyard by a card effect: Special Summon it from the Graveyard

Add an amount of mana of that color equal to your devotion to that color

Set: Cybernetic Revolution Card type: Field Spell Card Rarity: Ultimate Rare When a monster that includes Elemental Hero in its card name attacks

Knowledge Vault [Legends] RC12 this card cannot be selectedSet: 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.