mtg assassin cards Roshan, Hidden Magister Assassin's Creed acr#133 (Artifacts Ezio, Altair, And More Magic:

This card has it all

While you can find these in Collector Boosters in an extended-art version as well, these cards aren't found in the Innistrad: Crimson Vow Commander decks

even without the Curio, the Accomplice can power out some explosive turns

They can be used in other formats but exist in the command zone, making them nearly impossible to use in a game of Commander

Unearthing the Lark : Accompanying the Guide is Reveillark, a creature whose departure from the field recalls spirits with power 2 or less back to the stage of battle

Gimli consistently eats away at your opponents life, and its a great counter to sacrifice decks