Brand New Auto Attack Mechanic

So here's a new mechanic that could be used on a new champ some time in the future. This is a brand new innate passive. On Auto-Attack, this champ deals 50% - 75% of the damage initially on the attack and for 5 seconds after, the target takes the rest of the damage 25%-50% as a bleed. This passive can stack up to a max of 13 (at 2.5 attack speed). The rest of the champs abilities could work on the number of stacks the target has.

To clarify, each stack decays at a rate of 1 every 5 seconds after that auto (the length of the bleed). So if I were to auto attack someone, once the bleed for that auto is done, they will lose that one stack of the passive.