Kraith

Kraith was a primal zerg pack leader on Zerus and leader of Kraith's Pack. According to Zurvan, Kraith was "immense and consumed by hatred".

Kraith was defeated by the new, primal reinfested Sarah Kerrigan, who consumed his essence.

Gameplay
Kraith has a rapid projectile attack, in which he fires small immobile creatures, with a wide spread, but a short range. The area is displayed before the attack emerges.

Kraith can make a charge attack. The line of attack is shown on the map before the attack goes off. At the end, he slams into a wall and stops moving briefly. Any creature hit by the dash attack would be sent flying. Immediately afterwards, primal zerglings fall from above to aid him in battle.