Andariel by MarioToast

Level 1

Endless Suffering: Quest: Whenever a hero dies, increase the amount restored from Anguish by 1% of Andariel's maximum Health and Mana, up to 15%.
Reward: After 15 Heroes have died, Anguish restores 3 seconds faster.
Precision Shot: Increase the range and initial damage of Poison Spray by 100%, but reduce the width of the cone by 60%.
Blood Armor: Shadow Strike grants a shield equal to 100% of the damage dealt for 3 seconds.
Rising Sadism: Quest: Minion kills grant 0.1 Attack Damage. Hero Takedowns grant 1 Attack Damage.
Reward: After gaining 20 bonus Attack Damage, Basic Attacks heal for 20% of the damage dealt.

Level 4

Poisoned Tip: Shadow Strike applies the damage over time effect from Poison Spray.
Leeching Shadows: Shadow Strike heals for 75% of the damage dealt. Healing doubled versus Heroes.
Crippling Toxin: The damage over time from Poison Spray slows enemies by 20%.
Excitement: Basic Attacks grant Andariel 10% increased Movement Speed for 7 seconds, stacking up to 50%.

Level 7

Shadow Leap: Increase the leap distance of Shadow Strike by 150%.
Revel In Misery: Andariel heals for 5% of all damage taken by other nearby units.
Gas Cloak: After using Poison Spray, Andariel deals 40 damage per second to nearby enemies for 6 seconds.

Level 10

Lethal Poison
Corrupt Rogues

Level 13

Hero Slayer: Increase all damage dealt towards Heroes by 30%. Reduce all damage dealt to non-Heroes by 40%.
Cull The Weak: Increase all damage dealt towards Minions and Mercenaries by 100%.
Sapping Poison: Andariel heals for 40% of the damage dealt by Poison Spray.

Level 16

Prioritize: Marked For Death now reduces the Hero's Armor by 25 instead, increasing the damage they take by 25%.
Glorious Exit: When Andariel dies, she explodes in a huge pillar of flame that deals 400 damage over 3 seconds in an area.
Double Strike: Shadow Strike now affects the two next Basic Attacks. Increase the cooldown by 1 second.

Level 20

Deadly Toxin: Increases the damage and duration of Lethal Poison by 20%. If the enemy dies while under the effect of Lethal Poison, double the effects of Anguish from that death and reduce the cooldown of Lethal Poison by 30 seconds.
Poison Spikes: Summon 2 more Corrupt Rogues. Andariel and the Corrupt Rogues' Basic Attack poison the enemy, slowing them by 15% for 1 second (stacking up to 60%) and dealing an additional 90 damage over 6 seconds.
Sisterhood of The Sightless Eye: Minion waves now spawn with a Corrupt Rogue. These Corrupt Rogues last until killed.
Bolt of The Storm