You all those magi that are really fat and just tire really easily. You think, with all their adventuring, they would be a kind of fit. Here's an answer, and it's the Powered Construct. They conjure it or have some mystical scientist make it and it practically does all the physical labor. With a power crystal that could light up a large city for a year or two, lifting a wizard's multiple runes and or scrolls is practically just a waste of time. Does the Powered Construct go maniacal and on a murdering rampage? Almost on a weekly basis, of course. If a mage has multiple Powered Constructs, that may become a problem that most definitely the he or she cannot handle. Should be a fun time working in the mines, building dirt houses, or fighting creepers.