Known for stuns and slows, vision from his 2nd ability, and a powerful ult.
He's very fragile and his ult is powerful, so enemies will go after him first. Watch your positioning.
His 1st ability stuns enemies who stay in its area for a set time. Use it together with his other abilities, for example by slowing them first.
His ult prevents healing and kills enemies whose health drops below a certain percentage. It has global range, so watch the map and use it together with teammates who have stuns.