As two actions, a bolt of lightning arcs toward a target that you can touch or see within 18 meters. The lightning can then arc to another target within 9 meters of the first target and a third target within 9 meters of the second target. A target can be a creature or an object and can be targeted only once. A target must make a Reflex saving throw.
On a failed save, a target takes 7d6 lightning damage and it can’t take reactions until the start of its next turn.
On a successful save, it takes half as much damage.
The lightning can arc to an additional target within 9 meters of the previous target for each additional mana or psi expended and the damage increases by 2d6 for each additional mana or psi expended. You can end the chain at any point.