"The quickest and most efficient solution is the best one," said Ouros.
Kerrigan took mass transit to Tarsonis. There she activated a psi emitter, luring billions of zerg there. Then she went to Zerus and got herself infested.
Then she went and killed Duran.
Make me a god," said Kerrigan.
Ouros made her a god.
No one cared.