Alexia's final form is a massive, immobile creature. This fight requires the Linear Launcher. First, you need to damage her enough with your most powerful weapons (Magnum, Shotgun) until she exposes her core. Once her core is exposed, quickly switch to the Linear Launcher and charge it up. Fire the Linear Launcher at her core to end the fight. This is a timed sequence, so be quick and precise. If you miss, you'll need to damage her again to expose the core. This is the ultimate test of your combat skills and resource management.
