Defender

A Defender is a type of magical weapon that grants a bonus to either attacks and damage; or to the wielder's AC.

Description
Defender weapons can come in the form of several different martial melee weapons, and otherwise take on the properties of that weapon. Additionally, they grant a +3 attack and damage bonus to the wielder for attacks made with that weapon. When the wielder makes their first attack with a Defender on their turn, they can choose to apply all or part of the bonus to their AC for that round instead, eg, add +2 to their AC and treat the Defender as a +1 weapon.

History
Nydas Okiro's scimitar was a Defender weapon. He was able to save it from the blast from the Tree of Names, and wielded it in the final defense and evacuation of Avalir before his death.