Damage everything in a straight line up to 60 ft. long originating from you with a blast of arcane power.
Intensify: Add up to 20 ft. to the beam’s length per boost from Intensify.
Friendly Fire:
You can try a DC 15 test of Spellcraft to exclude a target from being affected by your spell.

All creatures in the area get a health (reflex*) save.

Fail:
The creature takes 1d8 elemental damage.
Intensify: +1d8 elemental damage per boost from Intensify.

Pass:
The creature takes half as much damage.

Friendly Fire:
A DC 15 test of Spellcraft can make an ally caught in your spell automatically pass their save and take no damage from the beam.
You may try this for each ally in the spell’s area.

Suggested Backfire: The spell blows up in your face. You take the full damage unless you pass a health save. Noone else is affected.

*If you cast this spell with the poison or dark element, the save against this spell is a health save.
Otherwise the save against this spell is a health (reflex) save.
Certain abilities interact with health (reflex) saves.

You overcharge your Arcane Beam spell.
Targets have disadvantage on their saves against your Arcane Beam.
Add up to 60 ft. to your Arcane Beam’s length.
You may make your Arcane Beam up to 10 ft. wide.