Keen edge

Keen edge was a transmutation spell that made a weapon magically sharp.

Effect
Applied to an edged or pointed weapon or up to fifty such projectiles, this spell doubled its ability to deal critical wounds for over 10 minutes, up to several hours.

Applications
Keen edge was used for the keen weapon enhancement.

History
Keen magic such as this was first developed by the old noble houses of the elf realm of Cormanthyr. By 1372 DR, this legacy survived in the Cormanthyrian elfblades, keen longswords that carried the symbols of these houses.