Moho Exploiter is an armed metal extractor. Built by all T1 land/air cons it is basically an extractor and an LLT at once. Due to its higher costs than a regular mex+LLT combo it is not worth building on your first expansions. However after you have established some good starting economy it is an effective structure to expand with. On top of the damaging function it also holds a decent HP (much higher than a regular mex).