Stoneskin

Stoneskin was an abjuration spell that turned a subject's skin stony in order to block blows, cuts, stabs, and slashes.

Effects
The target creature felt a brief tingling sensation before their skin, clothes, and hair took on a gray, stone-like appearance.

A creature warded by stoneskin was able to resist much of the damage caused by bludgeoning, cutting, stabbing, and slashing attacks. Only adamantine weapons, +5 weapons, and magical assaults could overcome it. Once the spell had blocked a certain amount of damage according to the caster's level of power, it was discharged.

Components
In addition to the usual verbal and somatic components, casting stoneskin required a dust of granite and diamond (worth at least 250 gp) to be sprinkled over the skin of the being to be warded.

History
Stoneskin was published in "Volo's Guide to All Things Magical" and became generally known to the magical community. It was a commonly used spell in the mid–14th century DR.

In Waterdeep in the Year of the Prince, 1357 DR, Kyriani cast stoneskin on Onyx the Invincible to protect him from the raking talons of the marauding Aviss. However, Aviss's partner Fellandar hurled the dwarf through the wall of the Selûne's Smile, which discharged the spell.