Slark

Slark is a melee agility ganker and semi-carry with extremely high mobility and damage potential, capable of stealing stats on auto-attacks to boost his own damage while remaining unseen even while attacking. His signature skill, Shadow Dance, provides him a period of invisibility that doesn't end upon casting spells or attacking, thus, he can freely strike upon his foes without fear of retaliation as long as his enemies do not have True Sight of him. It also provides him with an insane rate of health regeneration (twice the rate of Heart of Tarrasque) and movement speed boost, as long as he remains out of enemy vision. He can also deal AOE damage with Dark Pact, which also doubles as a purge skill; on the other hand, Slark weakly damages himself upon casting it. Essence Shift is what makes Slark fearsome if left unattended - each of Slark's attacks will reduce the target's stats and convert it to an Agility boost for himself, enhancing both his damage, attack speed and armor while weakening his target.

Slark can be tricky to use since Pounce and Dark Pact require timing, and while his damage potential is great, he is quite fragile and his survivability is drastically reduced by True Sight, since it negates the health regen and movespeed boost of his ultimate's active. He is recommended for intermediate players.