> "Gaining a kill or assist on that target permanently empowers Kindred's attacks, granting them 1.25% of the target's _**current**_ Health in bonus physical damage."
To proc this the target needs to die. The target will have 0 health. After intense calculations, this means that you will always gain 0 bonus ad according to the tooltip. Probably not the functionality or what happens, but could the clarity maybe be improved a little bit?