In Borderlands 3, we find out a lot about the different sirens, including new powers. There is still at least one kind of power not known, as we have: Phasewalk, Phasegrasp, Phaseshift, Phaseleech and Phasetrance.
Siren number 6 will probably be a PC in Borderlands 4, but they could reference her in B3. Either way, I’d love to see her power be Phasewake. The way it works is this: when she activates her action skill, she is surrounded by an aura of power and moves faster. As she moves, she leaves behind her a trail of that power, which damages enemies when they touch it. It would look like a translucent wall, normally (Think sort of like the speeder bikes in Tron) and can be moved through freely by players.
The power aura would also enhance melee attacks for extra damage during the action skill.
The ability could be split into various elemental types - Fire leaves a line/wall of flames (or 2, for a back to the future reference), Corrosive leaves a puddle of acid (with fumes), Shock leaves a long lightning bolt that sends out smaller bolts to the ground and enemies, Cryo freezes the ground solid (with icicles sticking up), Irradiated leaves a cloud in the air, and if they add more elements, they’d have extra effects.
The player could equip one or two elements at a time (with a damage penalty for having two, so it’s not overpowered), and change between them in the skill tree menu.
Skill trees could focus on: 1) adding elemental effects and increasing the damage, range and duration of the wake. 2) increasing the siren’s damage and speed, with synergy between the two, I.E. more speed = more damage. These effects are increased during the Phasewake. 3) Adding effects to the wake, like healing allies, spawning homing blobs of the element equipped, triggering explosions when you cross the wake with itself, amplifying damage of bullets that pass through the wake, etc.
Please add thoughts/suggestions below. Thanks. =]