Bound Longsword is a spell effect that conjures a lesser Daedra bound in the form of a magical, wondrously light Daedric longsword. The longsword appears automatically equipped on the caster, displacing any currently equipped weapon to inventory. When the effect ends, the longsword disappears, and any previously equipped weapon is automatically re-equipped. This is a good spell for Low level players in Morrowind who use longswords as weapons as it more powerful then a lot of longswords and is easy to use. Also longswords are hard to find at the beggining of the game, as most bandits use shortswords instead, making it good for players who chose longsword as a major skill.^[1]

References

1. ↑ The Elder Scrolls III: Morrowind (Construction Set)