Ouch, tough question. After she helps the Scions with aetheric research, finding Iceheart/Shiva, and creating a means to trap the Ascian, Nabriales pressures her, Minfiila, and the Warrior of Light. We manage to capture the Ascian in the White Auracite, but the aether harnessed isn't enough to destroy both Ascian and the crystal. That's when Moenbryda understands Master Louisoix's sacrifice and uses herself as fuel for the aether, killing the Ascian in the process.