Il tutto è spiegato nel riquadro del rituale della rinascita su Races of the Dragon ma ti riporto qui le parti salienti.
Other Racial Traits: You lose all other racial traits of your original race, including bonus feats, skill bonuses, attack bonuses, save bonuses, spell-like abilities, and so forth. Two specific instances warrant clarification.
• If your original race granted you a nonspecific bonus feat (such as the one gained by a human at 1st level), any feat can be lost, so long as it is not a prerequisite for another feat you have.
• If your original race granted bonus skill points, you should deduct an appropriate amount of skill points from your current skill ranks. The specific skills affected are up to you, but the DM’s input might be required to adjudicate tricky situations (such as multiclass characters who might have purchased ranks of various skills as both class skills and cross-class skills).