From Pathfinder Rage of Elements, which isn't enabled.

Arrow Salvo

SPELL 6

Traditions arcane, primal

Cast

Range 100 feet

Area 30-foot burst

Defense basic Reflex

You conjure an immense wooden bow that launches a salvo of massive arrows at all nearby enemies. All creatures in the affected area take 8d10 piercing damage, with a basic Reflex save. On a critical failure, the target is knocked Prone from the force of the impact.

Heightened (+1) Increase the damage by 1d10.

Pathfinder Rage of ElementsOGL