You have a greater dragonmark.
Prerequisites: Member of appropriate dragonmarked race and house, Least Dragonmark, Lesser Dragonmark, 12 ranks in any two skills.
Benefit: You gain a greater dragonmark and the use of one spell-like ability associated with the greater dragonmark of your house (see the next section of this chapter for information on dragonmarks). In addition, you can use your least and lesser dragonmark spell-like abilities one additional time per day.
A saving throw against one of your dragonmark spelllike abilities has a DC of 10 + the level of the spell + your Cha modifier.
Your caster level for your dragonmark spell-like abilities increases to 10 + your level in the dragonmark heir prestige class (if any).
Source: Eberron Campaign Setting