I have just done some minor tweeks to this class. Not sure at the moment on this though as the Brecht one gets +4 Dex in total, which might be a bit unbalancing.

Half-Elves, Cerilian

Racial Traits

Average Height: 5’6” - 6’2”
Average Weight: 130 – 190 lbs

Ability Scores: +2 Dex, ( +2 Wis Anuirean, +2 Dex Brechtur, +2 Int Khinasi, +2 Con Rjurik, +2 Str Vos)
Size: Medium
Speed: 6
Vision: Low light

Languages: Sidhelien, Regional language, choice of one other.
Skill Bonus: +2 Perception, +2 Nature
Sidhelien Will: you gain a +2 racial bonus against charm effects.
Dilettante: At 1st level, you choice an at-will power from a class different from yours. You can use that power as an encounter power.
Dual Heritage: You can take feats that have either Sidhelien or human as prerequisites (as well as those specifically for half-elves), as long as you meet any other requirements.
Sidhelien Blood: Half-elves are able to cast true magic without being blooded.