In reply to Narrator V (msg # 13):
Bloodlines are from Unearthed Arcana, 3.5 splat book. Close details on the link;
https://www.d20srd.org/srd/var...races/bloodlines.htm
But short version; you pick a bloodline and you gain bonuses based on your overall char level. However, the amount of bonuses depends on the intensity/purity of the bloodline. This is measured in taking bloodline levels, which function bit the same as taking LA which happens during specific levels instead of immediately.
But unlike LA the bloodline levels, even if they do not provide anything themselves (no skills, HD, no BAB etc), the bloodline levels are considered 'levels' for gaining feats example and bloodline levels stack for caster level (not casting ability, so no spell slots or spells known but CL for calculating spell power). Also, it can stack other features like count towards cleric levels for some domain or class features (like domain which says 'xx functions cleric level number of rounds').
But bloodline levels can get interesting regarding multiple class stacking instances. For example, if you have wizard, sorcerer, and cleric levels and then get a bloodline level, the bloodline level is added to
all those classes casting level. Also any save DC stuff which relates to having 1/2 in class levels, bloodline levels stack with that in every case you have.
With gestalt, it can get pretty whacky so thus why suggest it applies only one side of the gestalt tree (or if want bloodline benefits on both sides, then bloodline levels take a level on both sides in gestalt). But besides this function, you get benefits based on the intensity of the bloodline in levels 1-20 (major bloodline giving a benefit at every level).
Major bloodlines overall in the formula sense give +1 to three stats, 2-3 feats, and skill bonuses, and then some small resistances (usually DR 5/alignment at 20th level). Some include some thematic abilities like smite good for demon bloodline or bonus to AC (like natural armor +1).