It can easily be combined with the Ability Absorbtion gift, simply making the rule that any vampires of higher generation provide permanent ability modifications. The vampire will be able of absorbing all powers of the higher generation vampire instead of merely one. And, unlike normal Ability Absorbtion, this doesn't count towards the limit of Abilities you can have absorbed. Im not sure if you will be required to actually have the Ability Absorbtion gift or if it's something all vampires can do.
Anyway, it sounds like the gift in the vampire chronicles, where Lestat gains powers from sucking the blood of the elders of the race.
Anyway, a rule I did not mention, but one that I am enforcing in my own campaign. A vampire can choose to create a spawn of lesser power if he chooses too. So, if a 2 nd. generation vampire creates another vampire, he can choose it to have the powers of a 4 th. or 5 th. generation vampire instead if he so chooses. Why this is a usable rule, the vampire can, if uncertain of his creation, choose to make it less powerful. Especially if you give them the power to gain generations by sucking blood of higher generation vampires, choosing to create new vampires of lesser power is actually preferable, since it makes it harder for them to turn on their master.
Anyway, it sounds like the gift in the vampire chronicles, where Lestat gains powers from sucking the blood of the elders of the race.
Anyway, a rule I did not mention, but one that I am enforcing in my own campaign. A vampire can choose to create a spawn of lesser power if he chooses too. So, if a 2 nd. generation vampire creates another vampire, he can choose it to have the powers of a 4 th. or 5 th. generation vampire instead if he so chooses. Why this is a usable rule, the vampire can, if uncertain of his creation, choose to make it less powerful. Especially if you give them the power to gain generations by sucking blood of higher generation vampires, choosing to create new vampires of lesser power is actually preferable, since it makes it harder for them to turn on their master.