Protective Mark
(Dragonmarked, page 143, DnD 3.5)
[General]
Your dragonmark makes you more resilient against certain weapon attacks.
Prerequisite
Any lesser, greater, or Siberys dragonmark
Benefit
You gain damage reduction 5/magic. In addition, you can spend 1 action point as a swift action to increase the damage reduction to DR 10/magic and bludgeoning, DR 10/magic and piercing, or DR 10/magic and slashing for 1 round.