http://www.nexusmods.com/skyrim/mods/81960?
Just finished a new mod that adds my take on shadow magic to the game while trying to keep it balanced.
Form Shade - Create a Shade for 45 seconds wherever the caster is pointing. The Shade drains 50 health when it kills an enemy and gives it to the player. Costs 75 health.
Shadow Reach - Use your weapon through the shadows and hit foes at a distance you never could for 10 seconds. 30s cooldown.(similar to Kenshi from Mortal Kombat)
More info on the mod page.
Enjoy.