Mal'ganis by Neirai the Forgiven

Mal'ganis's auto-attacks deal 15% additional damage to targets under 30% health. Attacking a target under 30% health will give Mal'ganis a burst of speed for 1 second.

Fires off a cone of healing and damage: ~120 healing per friendly target and ~90 damage per enemy target. For each enemy hit by Carrion Swarm, do +15 damage and +30 healing to each target. This bonus damage and healing can't go further than 80 damage and 135 healing.

55 Mana. 10s Cooldown.

Ranged, targetted spell.

Puts a single target to sleep: For 1.5 seconds, the target will take a -20% speed buff and display a distinctive animation. Then they will be stunned for 3 seconds.

Any damage taken during either effect will break Sleep.

60 mana  16s cooldown

Activates an aura (this aura is about twice as wide as Arthas's Frozen Tempest aura.)

While the aura is active, friendly players gain 75% of the damage that their autoattacks deal as healing.

Each autoattack costs Mal'ganis 12 mana. The aura also takes a minimum of 20 mana per second.
When Mal'ganis turns off the Aura, it must cool down for 4 seconds before he can activate it again.

Grants a single friendly target the Purgatory effect for 3 seconds:
During the Purgatory effect, the target's health can go into the negative without them dying. However, if the negative health is not healed by the time that Purgatory wears off, the target will instantly die.

During the Purgatory effect, the target gains 10% health from all of the damage they do.

100 mana cost. 75 second cooldown

Short range: Mal'ganis turns into a conical swarm of bats and quickly moves to the target location, where he reappears in all his dark glory. Enemies caught in the swarm take ~195 damage.

While Mal'ganis is a swarm of bats, all attacks will miss Mal'ganis; so will any targeting any of Mal'ganis's allies in the effected zone (which is not very large: think an area about the size of Flamestrike.)

The entire process should only take about a second.

85 Mana. 65 Second cooldown.