Burning hands

Burning hands was a spell of the alteration  or evocation school of magic.

"In the next instant, her hands burst into fire. The blazing flare lapped across her fingers and reached out several feet, causing the ghouls’ flesh and raggedy strips of cloth to burst into flames. She watched with revulsion as three ghouls flapped their arms in an attempt to put out the fire."

Effects
Learned by some wizards of relatively low experience, burning hands momentarily engulfed the wizard's hands in a burst of magical flames and then expelled them rapidly into an adjacent area of roughly 25 ft (7.6 m) in diameter. Earlier versions projected a cone of flame from the fingertips of the caster's outstretched hands, thumbs touching. These flames did no harm to the wizard but could scorch the flesh of others caught nearby during the fiery blast. The effect was instantaneous but damaging and the wizard required only a short, momentary rest to refocus in order to cast the spell again.

The post Second Sundering version cast flames in a 15 ft (4.6 m) cone and had the older spell casting method of having ones thumbs together with outstretched hands. This ignited any flammable object that wasn't worn or carried.

If cast in the phlogiston, the spell caused the immediate detonation of the caster and everything within a 5 ft (1.5 m) range.

Variant
A modified version of burning hands was developed by the mage Asmiak before the Time of Troubles. It created a thinner, but longer ray of fire that extended 2 to 8 ft (0.61 to 2.4 m) out from the caster. The flame was directional and could be fanned back and forth.

Components
This spell required only verbal and somatic components to cast.

Inscription
According to the Book of the Silver Talon, the ingredients for the ink used to inscribe burning hands into spellbooks was: one ounce of giant octopus ink, two ounces of green plant matter, four ounces of animal flesh, a piece of wood (such as a log or plank), a scrap of cloth, a sheet of parchment and either 3 drops of red/gold dragon blood, two ounces of fire elemental phlogiston, six salamander scales, or the horn of an efreeti. The last component of the ink could be replaced with the ichor of a hellhound, blood of a fire drake or ash of a tome guardian.

All the components, save for the ink, would be added to a burning brazier and burnt down. The coals that fed the fire would be added to the mixture and lastly combined with the octopus ink. The sediment would not be emptied and the concoction was to remain covered until cool.

History
The spell was attributed to Netherese arcanist Primidon in and was originally called Primidon's burners.

Before the Spellplague, burning hands was also used by sorcerers and could only be cast a number of times equal to how many times the wizard had prepared the spell  or the sorcerer had energy for. After the Spellplague burning hands became easier to access, though as a consequence it no longer grew in power with its caster.