Riki

Riki, the Stealth Assassin, is a melee agility hero that uses stealth in order to surprise enemies and quickly kill them. Usually being played as a carry, his trademark ability, Cloak and Dagger, lets him sneak up on his enemies from behind and deal massive backstab damage, and then quickly escape. This enables him to close in on the enemy and drop his devastating Smoke Screen, which cripples fighters and spellcasters alike. Blink Strike allows Riki to chase with impunity, while Tricks of the Trade makes quick work of his enemies during teamfights. A sneaky and agile assassin, Riki ensures that none of his foes can get away or catch him with each passing opportunity.