Guys, just found something funny in a Forgotten Realms game book,
Serpent Kingdoms. Remember that OP ability to rip Shards off hosts and transfer them to others?
Ability Rip
Transmutation
Level: Sorcerer/wizard 7
Components: V, S, M
Range: Touch
Target: Two living creatures
Duration: 1 hour/level
Saving throw: Fort. negates
Spell resistance: Yes
You rip a supernatural ability of your choice away from a creature and transfer it to another. The two creatures must be within 30 feet of one another and remain conscious throughout the casting of the spell. In exchange the recipient loses a supernatural ability. If it has no class level it instead loses two class levels (or two Hit Dice if it has no class levels)
Class features can't be transferred by means of this spell. The spell fails if it is used to transfer an ability to a creature that lacks the size or other criterion for for its use or if the recipient has no supernatural ability to trade and fewer than 2 Hit Dice. Either subject may negate the spell witha fortitude check.
Material component: a caterpillar in a cocoon.
It looks like power transfer did not require that bloodline after all.