Wretched Flatulance
So goblins and orcs are relatively filthy creatures. How about an ability that makes a cloud of stink in a room. Passing through the cloud essentially nails people with the Stink affect from skunks (faerie fire with scan penalty) and maybe causes puking while they are in the cloud. Give it a short duration as a cloud and a timer on re-use. This could be huge in helping defend orcs/goblins from those rangers always sitting outside the village. It might make more sense to have something like this as part of a witchdoctor skill set though as well and make it magical stink instead of doo doo butter based.

Play Dead
Goblins are basically the runts of the orc village and its a cruel cruel world out there. They often survive by laying low. A goblin can play dead which makes them look like a corpse, takes them off of where and who pk and people can look at them as a corpse. If anyone tries to take anything from "the corpse" it breaks the ruse and if the goblin uses any commands at all it breaks the ruse.