Need help modifying my Champion Concept. [Daegal, The wielder of chains]

http://i.imgur.com/x7bQ5uo.jpg

According to my previous post regarding Daegal, this is a solid concept, new, and apparently fun to play. But there were tons of stuff missing or that could be modified. Where as i need help with the following points and PLEASE add anything you think is new or has never been done in the League of Legends before.

• I need a passive that uses "Rage" or whatever you wanna call it instead of mana and when the bar is full, it activates an active buff. My previous decision was that each time he attacked something the bar would slowly fill. Gnar-style, and when it reaches an optimum it would rant him bonus attack speed, but now that i think about it, it isn't completely innovative. **[you can add Dark magic if you want to but i prefer if it's something related to his whole character vibe, like chains and stuff] **

• I need a new E because tons of champion use true damage.

• I also need any suggestions you guys thing i should make, whatever it's related to

Thanks a lot Guys.