Can we just do something like this? (Blade of the Ruined King thing...)

Blade of the Ruined King + + 750 = 3400(unchanged) 50 AD 10% LS

Unique Passive: Deals 3% of target's current health in physical damage. (Min 10 vs champions)

Unique Passive: (Giant Slayer) Deals an extra 1% of target's current health for every 200 more health they have than the user (cap 10% at +2000 HP) obviously capped against jungle monsters, probably at its current value. Minimum 8 damage per % point. (max 80[from this effect]/90 total)

Unique Active: (Momentum Shift) Steals 10% of opponent's max HP as physical damage and 20% (+2% per 200 max HP deficit [2000 max]) of their movement speed.

There we go, real anti health stacking. Still viable on squishy melee champs as long as their opponent has ~4000 HP. Less effective on a really bulky character.

The numbers are all of course subject to change, but we have an item () sitting around in a kind of meh state right now that doesn't really fulfill its advertised purpose of anti health stacking. We have another item () that only builds into one item altogether (). Kill 2 birds with 1 stone.

The thing is, you have to choose. You have to choose between the 15% bonus physical damage of LDR or the % current health shred of BotRK which means it's a much less efficient form of killing someone that's only slightly more tanky in terms of Health (~500ish HP) but is absolutely devastating to someone with 1500 or 2000 more HP than you.

Just an idea I had earlier in another thread that I've thought about for a few hours now on how to implement it.