At first glance, we have a pretty underwhelming stat line for a 3 threat, with 5 health, a medium move on a 35mm base, 3 physical and energy defense with 2 against mystical attacks but there’s some caveats to an important amount of these stats that we’ll get to later. Nothing changes on her injured side.
Adamantium Slash was already a solid builder on the original Wolverine, with 5 dice and two wild triggers, with, most importantly, a pierce to get additional damage through. It becomes stronger when wielded by a model costing 1 threat less.
X-23’s first and only superpower with a cost is Frenzy, which, when she dazes or KO’s an enemy model, gets to do make short move followed by an Adamantium Slash. Frenzy gives her additional mobility and action economy. This superpower can make X-23 really shine, especially against wide lists with 3 and 4 threat characters.
Adamantium Skeleton makes X-23 effectively a size 3 for throws, meaning she’s a little harder to displace than an average 3 threat. Despite having the same name as Wolverine’s ability, does not have the same effect. Where Logan’s ability count him as 3 for both throws and pushes, X-23’s version only affects throws, meaning she can still be pushed like most size 2.
Assassin Training is what changes her defenses from below average to good, and her attacks from solid to above curve. It gives her a very welcome consistency both offensively and defensively.
Big Sis is an interesting superpower. If Honey Badger is damaged by an enemy effect within R3 of X-23, she gets to move medium towards Badger. Because Badger has access to a taunt, X-23 is more likely to benefit from the extra movement. It’s an interesting effect that adds a synergy with her sister and offers a nice bonus, but I don’t think it’s an effect worth forcing either model on the table if the scenario or match up doesn’t warrant it.