What is in this image? Describe it as if you were explaining it to someone from the 15th century.

This image depicts a fantastical contraption, somewhat akin to the carriages you might know, but with neither horses nor oxen to pull it. Instead, it moves by its own arcane means, possibly driven by gears and unseen forces. It has a long arm, much like the mast of a ship, but it is solid and fitted with hinges and joints, terminating in a hook similar to those used for lifting heavy goods at the docks or for hoisting sails. The arm extends upward and outward, capable of reaching high and lifting loads much heavier than several men could manage.The front of the contraption is adorned with features reminiscent of a grimacing face, which might be imagined as an attempt to ward off malevolent spirits or merely as whimsical decoration. Beside this mechanical beast, there is a small cone, striped like the poles outside places of healing or the tents at markets, perhaps a marker of caution or territory.In your time, imagine this as a kind of mobile siege device or mechanical beast of burden, crafted not from wood and iron alone but from materials and methods as mysterious as the alchemists'' dreams. It is a creature of utility, capable of manipulating weights and distances far beyond the scope of simple human strength.