Ghost ArkGhost Ark is a powerful new vehicle that grants unearth for three mana to every artifact creature in your graveyard when you crew it
Epic Multiplayer BattlesCommander is a multiplayer way to play Magic, an epic, free-for-all battle full of strategic plays and social intrigue Introduces 20 Commander Cardsthis deck introduces 20 never-before-seen Commander cards to Magic: The Gathering
If you're looking for more instant-speed removal, Wear/Tear , Stroke of Midnight , and Beast Within are good additions with a lot of flexibility.
Certainly viable for cube but not played as much as the quality of the card suggests
However, there is more to consider when it comes to how much collectible cards are worth
Emrakul, the Promised End Emrakul really doesnt understand that eldrazi are supposed to cost a lot of mana, does it