First just build 9 drones and an overlord. continue to build drones throughout the game unwhen u have around 9 use the extractor with 3 drones. make 3 sunkens then build 2 other hatheries ( or more your choice ) make a lair upgrade zergling speed. then when u have 10 or morew overlords filled with lings drop them in your ops base and laugh at their pain.

ps, this strategy isnt the best in the world but its funny as hel if it works out.

CreepColony's Opinion: I have actually done zergling drops before (with adrenal glands) and it actually works quite well. You'll be able to take out a bunch of buildings.