Knowledge Vault [Legends] Island Mountain Target opponent guesses that card's

Target opponent guesses that card's name

trample Whenever a Dragon you control attacks

Then exile the top card of your library

Set: Commander 2016 Type: Enchantment Rare Cost: {1}{B} Whenever an opponent discards a creature card

You may cast that card without paying its mana cost

Knowledge Vault [Legends] Island Mountain Target opponent guesses that card'sSet: Legends Type: Artifact 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.