Slivan

"Welcome...to your demise."

- Slivan confronting the Queen of Blades

Slivan, the Eternal Mother was one of the primal zerg pack leaders of Zerus. She was described as "hollow and destructive" by Zurvan.

Slivan was defeated by the new, primal Queen of Blades, and her essence absorbed.

Game Unit
"More! There must be more!"

- Slivan's combat strategy

Slivan is a larger version of the swarm host and spawns virtually endless waves of creepers, as well as expelling prolonged streams of acid which collect in puddles, damaging anything within. The creepers take some time to explode and have little health, meaning Kerrigan can easily dash over them to clear the way.