Nicol Bolas, Planeswalker [Duel Decks: Ajani vs. Nicol Bolas] Thrull if you control the artifact

if you control the artifact with the highest converted mana cost or tied for the highest converted mana cost

" —Imran

Set: Prophecy Type: Instant Rarity: Rare Cost: {8}{G} Creatures you control get +7/+7 until end of turn

And you thought Yawgmoth drove a hard bargain

Nicol Bolas, Planeswalker [Duel Decks: Ajani vs. Nicol Bolas] Thrull if you control the artifactSet: Duel Decks: Ajani vs. Nicol Bolas Type: Legendary Planeswalker Bolas Rarity: Mythic Cost: {4}{U}{B}{B}{R} +3: Destroy target noncreature permanent. 2: Gain control of target creature. 9: Nicol Bolas, Planeswalker deals 7 damage to target player or planeswalker. That player or that planeswalker's controller discards seven cards, then sacrifices seven permanents.