As an action, lightning expands from you, zapping all nearby creatures. Each creature other than you in a sphere centered on you must make a Reflex saving throw.
On a failure, it takes 2d12 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.
You can increase the damage by 1d12 for each additional mana expended.
Storm Pulse. You can expend 1 additional mana so the lightning around you is continuous. The duration changes to 1 minute/mana, concentration and the lightning erupts around you in an aura shaped as a sphere. Until the spell ends, the aura moves with you, centered on you.
Whenever a creature enters the area for the first time on a turn or starts its turn there, it must make the Reflex saving throw. The damage is reduced to 1d12 and additional augments to the damage increase the damage by 1d12 for every two additional mana expended, instead of the normal increase.