Hero Idea: Faux (Pronounced Foe)

Dire/Strength

STR: 64.5 at 25 (17 + 1.9/level)
DEX: 54 at 25 (14 + 1.6/level)
INT: 65.5 at 25 (23 + 1.7/level)
HEALTH: 1708 at 25
MANA: 1079 at 25
DAMAGE: 43 - 52
RANGE: 575
MOVEMENT SPEED: 295

SUMMARY- The idea for this hero is a shadowy silhouette that moves across the ground. A shadow that can jump into and out of objects, creeps, trees, heroes, towers, and siege weapons at will and uses this as a means for supporting, partner ganks, and quick travel across terrain.

SKILLS-

Q) Shadow Burst (Active/Self)
RANGE- 600
DMG- 80/120/175/250
STUN- 1/2/3/4
MANA COST- 60/100/130/150
DAMAGE TO SELF- 50/85/120/140
COOLDOWN- 15
***Can be blocked by BKB and REPEL, but still stunned***
Faux leaps into an enemy creep/or hero and explodes out, causing damage and stunning the victim. The amount of energy Faux releases harms herself as well

W) Possess (Active/Point/Unit)
RANGE- 300
MANA- 25
COOLDOWN- 2/1.5/1/0
***Can be blocked by BKB and REPEL***
***If BKB or REPEL are used while Faux is possessing she will be purged out and exposed***

Faux leaps into and the nearest unit and turns invisible. Faux can also possess creeps, heroes, siege weapons, trees and towers. If any of these units dies or is destroyed while Faux is possessing them, she is exposed.

E) Possessive Curse (Toggle)
HEALTH DRAIN TO FAUX/TARGET- 1%/2%/3%/4%
MANA DRAIN TO FAUX/TARGET- 2%/4%/6%/8%
ATTACK SPEED SLOW- 10/20/30/40
MOVESPEED SLOW- 8%/16%/24%/32%
***FAUX CAN DENY HERSELF AND UNITS***

Faux exerts a decaying force that cripples and slowly drains herself and the unit she is possessing.

R) Possessive Spirit (Toggle)
HEALTH REGEN TO TARGET- 1%/2%/3%/4%
HEALTH DRAIN TO FAUX- 1%/2%/3%/4%
MANA DRAIN TO FAUX- 1%/2%/3%/4%
ATTACK SPEED BUFF TO TARGET- 10/20/30/40
MOVESPEED BUFF TO TARGET- 8%/16%/24%/32%
***Increases attack speed of towers***
***Increases movespeed and attack speed of siege weapons***

Faux exerts a positive surge of energy that rejuvenates the possessed target

T) Moonlight Energy (Passive)
DURING THE DAY, FAUX SLOWLY TAKES DAMAGE AND MOVESPEED SLOW WHEN IN ENEMY VISION OR WARDS.
DAMAGE PER SECOND- 4%/3%/2%
MOVESPEED SLOW- 15%/10%/5%

DURING THE NIGHT FAUX SLOWLY REGENS HEALTH/MANA AT A CONSTANT RATE AND HAS HER ABILITIES MANACOST AND PENALTIES CUT BY 1/4 TO HERSELF.

HEALTH REGEN- 2%/2%/5%
MANA REGEN- 2%/3%/5%

The goal of this hero is an incredibly fragile yet slippery hero that bounces in and out of combat and supports heroes by possessing/healing them or by assisting in ganks by possessing/decaying enemies. She can quickly hop tree->up a creep wave->tree->enemy (explode out) and hop away. She would be as fragile as IO (same stats as a starting point) so if exposed, she is easily demolished.

Thoughts?

Seems like a really cool idea! I've always wanted a hero that basically is focused on lifestealer's ult (my personal favorite ability in the game). But, one point of clarification... Could you possess enemy units? And if so could you possess enemy heroes?

Yes you can. That is where the the toggle abilities come into play. You could possess an ally to heal/buff or an enemy creep/hero to farm/ assist in ganks. The risk factor comes into play with draining your own life and mana while also being close to the enemies with your fragile frame.

This looks awesome!

Nicely balanced as well I think. Is her Ulti the [T]? If so, maybe the Curse and Spirit can inversely scale on damage to self? Like Huskar's Ulti. Otherwise it just becomes quicker acting, which isn't the best reason to level it =P.

Does her Shadow Burst actually move her to the enemy or is that just a tooltip description?
Also, is Possess a targeted skill or random?

Thinking of counters, I've got:
Omniknight - Free magic immunity to get her out of people (like you mentioned)
Timbersaw - Take down trees and open up vision to see her
Bloodseeker - If she's below 50% and it's daytime, she is definitely gonna die since he'll see her all the time.
Bounty / Slardar - True sight (Will that affect creeps she's possessing as well?)