You mark several allies with a flaming rune. This rune does not cause Damage, and sheds light as if it were a torch. While the Firebrand burns, any Creature it marks is immune to Damage from any fire spell you cast. All of the target's Weapons (both natural and manufactured) inflict +1d6 points of fire Damage on a hit (this bonus fire Damage stacks with any amount of fire Damage a creature's Weapons might already inflict). At any point during the spell's Duration, a Creature bearing a Firebrand can launch a beam of fire at any target within 30 feet as a swift Action. This ray requires a ranged touch attack to hit and deals 6d6 points of fire Damage. Once a Creature uses its Firebrand to fire a ray in this manner, the effects of the spell end for that Creature.