Blood Potency

Blood Potency (BP) is a concept introduced in Vampire the Requiem to replace Masquerade's original Generation mechanic. It was combined with an updated version of Generation in V5 mechanics, but the CHB version is based off of 2nd Edition Requiem with a nod towards Generation in that the sire's BP determines the childe's BP. Thin Bloods are an idea introduced in V5.

The higher one's BP, the more powerful their blood. High potency is also a good indicator that a Kindred has either been around for at least a few hundred years or has committed Diablerie. Source: VtR 2.0, Masquerade, V5, and House Rules.