Emrakul, the Promised End [Eldritch Moon Prerelease Promos] Trap The vedalken protect the Knowledge

The vedalken protect the Knowledge Pool at any cost

you can Special Summon 1 Fiend-Type monster from your hand or from either player's Graveyard

destroy all monsters your opponent controls

But usually it's better to make a wall out of the wood and let trouble do the knocking

Emrakul, the Promised End [Eldritch Moon Prerelease Promos] Trap The vedalken protect the KnowledgeSet: Eldritch Moon Prerelease Promos Type: Legendary Creature Eldrazi Rarity: Mythic Cost: {13} This spell costs {1} less to cast for each card type among cards in your graveyard. When you cast this spell, you gain control of target opponent during that player's next turn. After that turn, that player takes an extra turn. Flying, trample, protection from instants An enigma as vexing as life itself.