RIFT are usually all about hitting things with weapons. Sure, they drop in some variety, but the focus of the class has always been a strong set of swords or axes or whatever. And the newest soul revealed for the upcoming Storm Legion expansion continues the trend if you assume that "lightning" qualifies as a weapon. The Tempest has been unveiled and promises to bring strong electrical powers and massive thunderstorms ripped from the Plane of Air into the Warrior's hands.
Tempests are versatile, able to attack from long range or channel lightning into a short-range destructive burst. They also possess illusory tricks to help evade defeat in the event that heavy armor isn't protection enough. Despite this, they're probably the least adept of all the Warrior souls at wielding non-lightning weapons, which means that another soul is necessary to provide hard-hitting weapon talents. Take a look at the introductory lore and early screenshots on the official reveal page, and keep your eyes peeled for the final two souls as the expansion nears release.
[Thanks to Brad for the tip!]