Homunculi or Big Rock Monster

If it could wish, it would have wished to know how to count; not that it would have helped much because it wouldn't have thought to start counting until long after it had begun walking. It was the fault of some pompously tumultuous wizard, one who had taken the most basic of spell animating that which is inanimate and attempting to find the limits of what that spell can do without additional powers or rituals or incantations.

“Rise and heed well, I command thee, creature of my burden, to walk.”

The creature in question cannot speak it doesn't understand language it is merely a formality transference of will from the Creator to the created. And in that way the creature can ’speak’ back to its master.

“Until?” It asked in this seamless void of understanding.

“ Until you can no longer walk”

And so it walked, amassing stone and silt and sand growing all the while into the form its Master had envisioned for it. It marched across the plains of its birth; carved channels in the sands of the desert. It could not walk over the sheer cliffs of the mountain and so it simply bore through, tunnelling like the mountain folk do with Stone against Stone whittling away its limbs to be replaced by those it had just destroyed.

“Have I walked until I can no longer walk?” The creature wondered this in the way water decides which path to travel downstream. The way a stone decides which way it will travel downhill.”No, further still I can walk”

Sensing sunlight for the first time in decades the creature had finally finished its travels through the mountain overlooking an idyllic village directly in its path. And so it walked through homes, through fountains, past livestock; a slow trudging March through the muck and low cobblestone of the town. Stone tools and metal cookware crashed across its back; fire scorched across its legs and ropes drew across its chest. But the creature would not stop, simply because it could keep moving forward.

The creature continued on for years and years still, sinking through bogs and swamps, sinking through the wider oceans. Its form ever changing with its environment but it is still that same simple spell that kept it moving forward; deep within that magical heart covered in stone skin.

More settlements, villages then cities; more unnecessary carnage,more undue suffering this time the arms they raise against the creature are of steel and spell-craft. For once it cannot ignore them, for once it wasn't an accident.

Another step.

“ Have I walked until I can no longer walk?”

A drop of rain slipping through the cracks in a rooftop.

Another step.

“ Have I walked until I can no longer walk?”

A flower growing to meet the sun.

Another step.

“ Have I walked until I can no longer walk?”

A tree deciding the moment it cracks and falls in a forest.