As an action, a stroke of lightning blasts out from you in a direction you choose. The lightning ignites flammable objects in the area that aren’t being worn or carried. Each creature in a cone or line must make a Reflex saving throw.
On a failure, it takes 3d8 lightning damage and can’t take reactions until the end of its next turn.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
Augment
You can augment this spell with the following options, expending mana for each option.
You can increase the damage by 1d8 for each additional mana expended.
Staggering Bolt. You can expend 1 additional mana so the damage is reduced to 2d8 and each creature who fails the saving throw is staggered until the end of its next turn.