Karthus, The Soul Harvester (Rework Idea)

Tried Karthus out today and he felt boring, strong, but boring. So seeing as I lost and didn't want to play league anymore, I'm gonna spend my time here, throwing out ideas nobody agrees with. The motivation behind this was to add a more Grim Reaper-esque champion to the game.

Inevitability of Death - {Passive} Everytime Karthus uses an ability, all enemies in 1500 range of him that are visible take 5% of the ability's damage (Only procs if he damages an enemy champion and or epic monster.

Touch of Death - {Q} Karthus takes his scythe and sweeps in a wide arc in front of him, damaging and slowing enemies, while also marking them. If a marked enemy moves to close to another enemy they will both begin to take DoT damage. Mark lasts for 5 seconds.

Soul Harvest - {W} (550 radius) Karthus teleports to target area, stealing 1% + 5% of ability power of maximum health from nearby enemy champs to add to his own. If the enemy is marked by Touch of Death, health steal is increased to 2.5% of maximum health.

Your Pain... My Pleasure... - {E} Karthus throws an Ethereal chain onto an enemy champion. While this chain is on an enemy champion, Karthus will heal for 12% of all damage dealt to the target. He can have up to 5 chains active at once. Chains will break if they move out of a 1400 range from Karthus. (Can be used on large and big monsters as well).

Euthanasia - {R} Karthus becomes unstoppable as he teleports behind an enemy champion as he attempts to cleave their head from their body. The ability will deal 10% of the enemy's max health with some ability damage. If this ability kills an enemy champion, Karthus will gain DeathLust empowering his abilities until his grasp on his victims soul is set loose and they respawn.

** Q** will have a wider area.** W** will always steal 4% of health.** E** will heal for 15% of damage.

P.S. - I know this takes away from Karthus' identity a lot, and I honestly don't care. Just an idea, try to imagine it isn't Karthus and maybe that'll do it for ya.