Katia's upgraded Rush: still a monster-truck charge, but now hitting everything in a wide cone and usable every five minutes.
Crowd Blast is the enhanced version of Katia Grim's Rush battering-ram ability, unlocked by equipping the Shade Gnoll riot shield. Katia still charges forward and dumps the bulk of her damage into whatever she physically strikes, but now everything in a wide cone in front of her also takes 10-20% of that damage. Given she killed the #2 crawler Hekla with the ORDINARY Rush, Carl recognizes this upgrade — stacked with her Wrestling Belt mass-doubling — hits like a runaway monster truck.
Most importantly, its cooldown drops from once per day to once every FIVE MINUTES, making it a repeatable centerpiece of her combat rather than a desperate one-shot.
A doppelganger super-tank charging forward as a battering ram, damage fanning out in a cone from the point of impact.
Katia's signature repeatable heavy-hitter, a cone-wide charge attack.
Also appears in books you've already read — spoiler-safe to their endings: