Additionally, when near death, they will charge a stronger laser attack that can not be interrupted. (zelda.gamepedia.com)
Keep attacking and it will start a sweeping laser attack. (linkshideaway.com)
For its E3 demo, Respawn was only showing off two: Ion has a bunch of powerful laser attacks as well as a fully automatic Splitter Rifle that fires deadly energy bolts in quick succession; Scorch is, as its name may suggest, an incendiary specialist, wielding the monstrous T - 203 Thermite Launcher, which turns areas of the map into flaming hell zones. (theguardian.com)