...
and
and
already have % health damage, lol.
But in terms of other champs I play:
... a lot of them also have it already

BUT FOR THOSE THAT DON'T
- Feel like this guy would get % missing health on his W's active, given it has more significant cooldown than Riftwalk and isn't AoE but would still force him to get into personal space range. Also would make last hitting with it ezpz.
- Feel like this would best fit also % missing health, this time on his R passive. Make it even more satisfying. Or maybe just have it deal 1% more damage for each 1% of the target's missing health.
- I guess as part of the big initiation, he could do % current health damage, or do the opposite of the above - 1% more damage for each 1% of the target's current health.
- Stacking % max health damage on passive. And heal for the damage dealt. LESS GO. Or I guess the % max health damage could be limited to his ultimate.
- It'd be neat to see % missing health in some way on his ultimate, so you can actively see the damage go up as they drop low. Kind of similar to Black Cleaver Lucian, actually. Guess it could also be cool to make it so procs with W's speed boost have some sort of % damage - probably % missing health or max health over current health.