Dota 2/Slithice the Naga Siren

Naga Siren is a melee agility hero usually played as a carry, but is known for her powerful initiation. She has one of the best single-target disables in the game with her Ensnare, as it goes through magic immunity and lock them down for an absurdly long period. She also has respectable pushing power and dps with her Mirror Image illusions, which she can also use to deal high AoE damage using Rip Tide. Her ultimate, the infamous Song of the Siren, is feared by everyone. It gives her team a great advantage, letting them set up other initiation spells or escape. While she might not carry as hard in the later stages of the game, Naga Siren is a force to be feared, and one hero you should never underestimate.

Mirror Image
Mirror Image creates three illusions of yourself. You are briefly invulnerable as you cast it, and it can dispel projectiles. These illusions are great for pushing towers, and it can increase your damage output due to the increased numbers. Once you get more durable from items, your illusions will also be harder to kill, to the point that you can send your illusions to push or farm a lane while you're pushing or farming another.
 * Ability: No Target
 * Duration: 30
 * Bonus Incoming Damage: 500% / 400% / 300% / 200%
 * Illusion Damage: 30% / 35% / 40% / 45%
 * Mana Cost: 70 / 80 / 90 / 100
 * Cooldown: 40

Ensnare

 * Ability: Target Unit
 * Affects: Enemy Heroes
 * Duration: 2 / 3 / 4 / 5
 * Mana Cost 75 / 85 / 95 / 115
 * Cooldown: 14

Rip Tide

 * Ability: No Target
 * Damage Type: Magical
 * Damage: 130 / 160 / 190 / 220
 * Armor Reduction: 2 / 3 / 4 / 5
 * Mana Cost: 80 / 90 / 100 / 110
 * Cooldown: 19 / 16 / 13 / 10

Song of the Siren

 * Ability: No Target
 * Duration: 7
 * Mana Cost: 100
 * Cooldown: 180 / 120 / 60

Song of the Siren Cancel
Stops Song of the Siren early.
 * Ability: No Target
 * Cooldown: 1