Andariel by KingKang

Passive

For every second an enemy hero remains near Andariel, 1% - .25% of their health is drained into Andariel every second depending on distance. This can affect up to 3 enemy heroes at once.

Cooldown: 6 seconds

Release a wave of 4 toxic clouds in a frontal cone traveling for several meters, affecting the first enemy each hit for x (+x per level) damage. Then another X (+x per level) over 4 seconds afterwards.

Cooldown: 12 seconds

Place 3 circles of flame at targeted locations, releasing rivers of flame towards them once selected dealing x (+x per lvl) to enemies along the way, once reaching each circle they explode into small pillars of flame causing X(+x per lvl) to enemies within them.

Cooldown: 13 seconds

Summon a line of 3 dark goblin knights, traveling forward through a short path, slowly pushing enemies in front of them to their destination and dealing X (+x per lvl) every second to those affected. 

Passive

Every 4 seconds your next basic attack against an enemy hero deals an additional 50% damage, if used when the target is below 50% of their max hp, then the damage bonus is increased to 75%.

Cooldown: 50 seconds

Select 1-2 enemy heroes, after a short delay you empower your anguish passive against them, to drain an increased 5%-2.5% of their max health every second with an increased anguish range. During this time, your anguish passive may still affect other targets and all affected targets have a 10% speed reduction. Lasts 6 seconds.

Cooldown: 100 seconds

Usable any visible location within 100 meters, open two connecting portals that remains for 4 seconds, you and any allies may enter portal at the cost of 15% of their max hp, appearing at the alternate location, their next basic attack will have 100% increased damage, and thier next basic ability will have 15% increased power.