As an action, you bombard an area with rocks. Each creature in a cone or line must make a Reflex saving throw.
On a failed save, a creature takes 3d4 bludgeoning damage and is staggered until the end of its next turn.
On a successful save, a creature takes half as much damage and isn’t staggered.
You can increase the damage by 3d4 for each additional mana or psi expended.
You can expend 2 additional mana or psi so each creature who fails the saving throw is stunned until the end of its next turn.