D&Dtools

You can temporarily turn any single normal or masterwork melee weapon into a magical, flaming one.
For the duration of the spell, the weapon acts as a +1 flaming burst weapon that deals an additional +1d6 points of fire damage.
On a critical hit, the weapon deals +1d10 points of bonus fire damage if the weapon's critical multiplier is x2, +2d10 points if the weapon's multiplier is x3, and +3d10 points if the multiplier is x4.
This spell effect does not stack with a weapon's enhancement bonus or with a flaming or flaming burst weapon bonus.
Material Focus: A lump of phosphorus, touched to the target weapon.