Magus or Magna Medivh was the last Guardian of Tirisfal, an ancient line of protectors bestowed with great powers to do battle with the agents of the Burning Legion. However, he was corrupted even before birth and possessed by the spirit of the demonlord Sargeras who used Medivh in his plan to conquer Azeroth. Medivh contacted the orcish warlock, Gul'dan, and together they opened the Dark Portal, which allowed the Burning Legion to begin its destruction of Azeroth. He was slain shortly after by a party led by one of his friends, Lothar.
Shortly before the beginning of the Third War, Medivh returned as a mysterious prophet, manipulating events in order to arrange the formation of a last-ditch alliance between the mortal races on Kalimdor, guiding them to victory at the Battle of Mount Hyjal.
My initial idea with Medivh was to make him a Bursty-Mage via his trait, however, as Carnage pointed out that left Medivh about "as useful as tits on a Breastplate" (- Tyrion) because he had no kind of Sustained Damage or Escape Mechanisms within teamfights. So to fix this problem I have changed the way Arcane Charges work on Abilities to apply additional effects and I have given Medivh an Escape tool, Evanesce along with 2 Talent choices on Level 1 that replace Evanesce.
Perfect!!! Make him special raven mount(only cosmetic, like diablo's charge) He had that in W3.
There is no Need to give him a Special Mount, he is perfectly capable of using a standard mount and besides, a Druid should get the Bird Mount.
I like the idea and overall theme. However, I feel that he has a huge weakness, which is his lack of both an escape and any survivability. As I see it now, he is going to be jumped on by any Hero and then he will get destroyed. At least Heroes like Kael and Jaina have strong CC to somewhat counter this. Personally, I am afraid that he might not be very exciting to play. Sure, he has an interesting passive, but I doubt people are gonna pay much attention to it as it is mostly a damage increase on all spells. I'm also afraid that he might not see a lot of interesting play, he's just gonna blow his load and then wait for cooldowns.
I hope I was not too blunt.
You were not Blunt, I prefer people giving their Criticism and Feedback no matter how harsh and as for the Problems, this is a WIP and I have many more ideas that I want to look at and he will be fleshed out this Weekend with Talents and Balancing.
I hope I was not too blunt.