Shield of Siberys

Your dragonmark protects you against the powers of those cursed with aberrant dragonmarks.

Prerequisite: Dragonmarked Bloodline or Eldritch Heritage (Dragonmarked).

Benefit: If a creature with an aberrant dragonmark comes within 60 feet of you, you can sense its presence (though not its exact location). In addition, you gain spell resistance equal to 15 + 1/2 your level in the dragonmark heir prestige class (if any) against the spell-like abilities of aberrant dragonmarks.

Shield of Siberys

Eberron inferno813