Greelus was among one of the Elite Sciense Vessels from Hale's Commandos, a mercenary organization that offered their services to Emperor Arcturus Mengsk, who needed assistance in eradicating the remaining Zerg forces on Char.
Greelus can conduct a wide range of defense mechanisms to repel from all danger.
A quick video demonstrating the hero from our developers and administrators
A support/carry hero, Greelus involves slowing down enemies while keeping teams silenced with his drones. Max Q first then E then W and harass enemies out of lane with your Q and W. Run a 0/2/4 talent tree getting health, armor, cooldown reduction, swiftness, wealth, and transport.