Acid Arrow

School: conjuration [acid]
Circle: ancient 2nd, arcane 2nd
Spell Components: V, S
Action Time: 1 action
Range: normal
Shape: bolt
Targeting: hostiles only
Base Duration: instant
Saving Throw: fortitude half
Spell Resistance: yes
Ritual Components: quality contained corrosive

A corrosive bolt flies at the target, dealing 3d6 acid damage and an additional 1d4 acid damage/round for 1d3+1 rounds. If caster has spell focus: conjuration, additional acid damage instead endures for 2d3+1 rounds.