Awesome Champ concept, went imagining his playstyle as I read through the entire post, and I seriously like it.
The only thing I dislike is the Scythe throw, I feel it is a bit limited since it needs a target.
I feel it has way more potential than that.
It should be a skill shot since then you can use it as an escape or chasing tool, plus it would be better as a skill shot since the ratio + damage on it at level 1 is quite strong especially for the utility it already brings.
Also I remember one of the rioters stating that mana burn might be a toxic thing to gameplay, refer to this: http://na.leagueoflegends.com/board/...25679#24925679
Perhaps instead of burning mana, it should silence champions in an area for 1.5 seconds or something, we haven't had something different like that in ages, would be a decent counter to champions like Amumu, galio, fiddles (when casting), kat, etc.
( Since it is an ulti, make it still usable when stunned but not while silenced )
Also, I feel that % based lifeseal is very powerful, if not too powerful, perhaps it should have a flat value + AD scaling or something, unless the other solution is lower it by 2% but make it scale very mildly with AD.
Perhaps you should add a small intro/entry about his general playstyle.
I'm just throwin you ideas that may improve the concept overall.
I really like it and feel it has potential which is why I'm giving you this feedback.
BTW, off topic question, where did you find that image of the reaper dude?
Those will be done, but most champions are too not balanced out yet when released. Just a saying that champions with a bit of power in it's spotlight gives more attention for players to buy it and will be reworked in a few weeks or so, due to in-game complaints ( marketing strategy ). As you can see I've made a typo on his Q/First skill, it is suppose to be similar to Tryndamere's spin, but a more useful and threatening type. About the Manaburn, I think it will be something really new and useful in this game, since most of the champions just have the same abilities in different looks.
Though thanks for the feedback.
The art is actually Hades and artwork by GENZOMAN a really good artist. Here is the link.