overall feel: antimage and obsidian destroyer combined, in the body of drow.
he will obviously need high mana and intel gain for his ultimate. but he can do damage and plays kind of like an agi hero. centaur is pretty much fixed as a str hero. i dont htink the model fits too well, but thats a minor issue.
1st and 2nd skill have kind of the same effect. if so, then the periodic castable one should have a significant effect. but i'd rather one of them have the redundant effect removed.
the current and passive aspects can be switched along with the nubmer balanced for incremental and "nuke":
2nd skill: the passive 2nd skill removes 1/2/3/4% of max mana.
1st skill: The active 1st skill removes 10%/15%/20%/25% of current mana.
-This makes you have to choose your target well when using hte 1st skill.
It nerfs the skill slightly a bit since it is also silence.
But it still has high potential, just not all the time.
- the passive gets to have effect all the time, rather than becoming really insignifcant against heroes who are in a low-mana state.
i don't think 25% of current mana is imba at all. a hero with 1000 mana loses 250, and 2000 mana loses 500. nothing. Rarely will heroes have that much mana, and even if they did, it's only once. they will be casting adn stuff. Subsequent uses of first skilll has greatly diminished effect b/c they will have lost and used up mana by the time you get to use your 1st skill a second time.