Repurpose Materials

Buyback - Sacrifice a non-token permanent.
Create a tapped X/X Colorless Construct creature token, then put a +1/+1 counter on each Construct creature you control.
Over time the Archmages have been forced to scrap all manner of ancient treasures in their fight for survival. Towards the end, if it wasn't a tool of war it would quickly be forged into one.