Level 1
Improved heal (Q): increase lesser heal cast range by 30%.
Holy water (Q) [quest]: Collect reg.globes. After 30 your Reward: using lesser heal also spawns a regeneration globe near you.
Priest's block (D): for every 2 charges on flash heal, you gain 50 physical armor against the next hero basic attack.
Level 4
Reduced confuse (W): reduce confuse cooldown by 5 seconds.
Mana steal (W): you gain twice the mana cost of the abilities, what used during the debuff and 5 seconds after.
Splash (Passive): your basic attacks deal splash damage around the target (in shadow form AA splash damage deals double damage).
Level 7
Lightwell (Active): place a light well on the ground, allies can drink from it, regenerate mana and hp. The well has 2000 HP.
Store (E): you can now store 2 abilities on your numbers bar (after 30 sec they still expire).
By the light (D): flash heal make the ally target unstoppable for 3 seconds.
Refreshing heal (D): flash heal refreshes basic ability cooldowns on the allied target.
Level 13
Mindgames (E): thoughtsteal can be cast on allied heroes too.
Mind block (E): the enemy hero can't use the ability, which you stole, for a 5 second. If it was on CD adds 5 second more CD to it.
Power word - Shield (Active): you can cast a spell armor on allies (50 spell armor against the next hero attack).
Level 16
Madness (E): You can use the stolen ability twice, with 1 second cooldown.
Curse (W): confuse gains an additional charge.
Loose control (W): movement commands do the opposite on the target during the debuff ( want to go up, insted the hero moves down etc...).
Level 20
Shadowpower (R1): in shadowform gain an aura that drain enemies mana, and slow them every second.
Quick shift (R2): swap your health instantly.
Shadow Word: Death (R3): The damage now comes instantly.
Mind vision (Active): Gain the heroic ability from the target. (what it chose)
WOw. If you don't actually know the general given purpose of your hero after creating him you've failed. A lot. Go away--your not fit for making a priest hero.
Now there is no need for you to start insulting another user.
Two heals standard in the base kit as well as a stacking crowd control reduction is way too strong for a Support Hero - no other Support has two heals built in starting at Level 1. Confuse is not all that game-changing for as soon as a player is targeted with it, he or she just needs to look at his or her Ability bar to see the new order. Thoughtsteal is so random that it could either copy, for instance, Malfurion's Regrowth or his Moonfire (and I would assume only one Ability could be gained at one time - Thoughtsteal grants an Ability for 30 seconds with only a 6 second cooldown). In one case this Hero has access to yet another heal while the other he has access to one of the least damaging Abilities in the game. While Shadowform does play on the fact this Hero has multiple heals, the lack of a duration can once again have a powerful outcome if the player was lucky enough to receive another heal Ability from Thoughtsteal or the player just cancels it after casting Lesser Heal and Flash Heal since both cooldowns were refreshed and Flash Heal received full stacks. Shadow Word: Pain is way too powerful as well - If the targeted Hero casts 5 Abilities within the 10 second duration, it dies. 20% maximum Health per Ability cast is just ridiculously high and the duration is too long.
Now while I feel this Concept is trying to do too much without much of a focus in mind, there is a play-style I can see in the 2 Abilities I have no problem with: Lesser Heal and Void Shift. Perhaps change the direction of this Concept to a back-line Support that keeps itself healthy as well as its allies and can swap its life with another for some insane burst healing potential.
Everyone forgets Uther nowadays, it seems... :(
True, I did forget the Unkillable Uther, however one heal is a skill-shot while both heals in this Concept are targeted.
Possibility of 3 heals from level 1 is still pretty ridiculous, though.
RNG is also pretty bad. Void Shift, to me, belongs on a Shadow Hunter or something.
could pick out more things but i'm in a reply chain (<_<)