X-23 is a clone of Wolverine that shares his ability to produce claws and heal. On the battlefield, these abilities essentially translate to her being able to absorb a lot damage and not back down in a fight. The new expansion adds X-23 to Marvel Champions with a pre-built Aggression deck. This deck comes with 16 of X-23's signature cards that feature characters like Honey Badger and Boom Boom.
This Hero Pack will retail for $16.99.
Fantasy Flight Games also announced Psylocke, another new Hero Pack for Marvel Champions: The Card Game (see "'Marvel Champions: The Card Game' Hero Pack Heads to Retail").