Star Signs (3.5e Variant Rule)
From D&D Wiki
In the world of D&D a character can be born under certain star signs. The however is a rare occurrence and therefore has great benefits. To represent the rarity of being born under a sign, the player upon the creation of a character must roll a d10, before the roll they must announce high or low. If they choose high, then to have a sign they must roll a 10, and if they choose low then they must roll a 1. Once it has been established that a character has a star sigh they must choose what sort of sign to have.
Star Sign Stat
This is just a basic outline of the star signs, the more specific details are thought up by the DM. For example a warrior born under the sign of the Bear may have the ability to count unarmed attacks as armed, or perhaps he/she can carry a greater weight.