This is an expansion and requires the base game to play: Yes

Join the fight for freedom with the Thor Hero Pack for Marvel Champions: The Card Game!

With the mythical hammer Mjolner, Thor has the power to defeat even the strongest of foes with legendary strength and power.

Like all Hero Packs, the Thor Hero Pack includes a fully-playable deck right out of the box that includes 15 Hero cards, 17 cards from the Aggression aspect, and 8 neutral cards. This deck allows you to harness the power of Thor, who is rewarded for engaging and dispatching villainous minions from the field!