Mighty Dragonmark
(Dragonmarked, page 143, DnD 3.5)
[General]
Your dragonmark is particularly strong, and its powers are harder to resist and dispel.
Prerequisite
Any true or aberrant dragonmark
Benefit
The saving throw DC of your dragonmark spell-like abilities increases by 1, and the caster level of your dragonmark spell-like abilities increases by 2.