Infested Munition Depot is both shortcut for Laura the Saber Of Blood to get Vespene Gas faster and also an ultimate opening of one of her overall tactics which features using a technology.

Rubybrood Zerg Drones are more universal with evolutions than other variants as they can mutate into an infested beings themselves.

(Terran Munition Depot and Zerg Drones belongs to Blizzard)