Moon blade

Moon blade was a spell that created a sword fashioned from pure moonlight.

Users
Specialty priests of Selûne, namely silverstars and guides had a special ability to cast moon blade. Clerics and others who commanded the Moon domain could cast the divine moon blade, while the Hathrans of the Witches of Rashemen knew an arcane version.

Components
It required verbal and somatic components. After the Year of Wild Magic, 1372 DR, the divine version required a divine focus while the arcane version required a material component: a small candy made of wintergreen oil.

Powers
Once cast, the spell created a magical, sword-like construct in the caster's hand, 3–4 feet (0.9–1.2 meters) long, taking the form of a blazing beam of moonlight. The moon blade was noiseless, weightless, and immaterial, but it could not be broken, dropped, nor passed to another. The caster fought with it as a magical sword; although the caster was inherently proficient in it, one trained with a sword could wield it their own skill.

Only a touch from the moon blade was required to attack. Its strike drained vitality or life energy without inflicting any visible wounds. Undead were especially harmed, their dead matter boiling away on contact.

A strike from the moon blade scrambled magic for a brief period. This nullified existing spells on the target and prevented the one hit from casting new spells. Their magic items also stopped functioning. The caster could only cast another if it only required a verbal component. However, after 1372 DR, a person struck could overcome this with an act of concentration.

The moon blade lasted but a short time, disappearing sooner only if the caster was killed or if they cast another spell required a material or somatic components.