The wind picked up to the point where it sounded like a chorus of a hundred howling banshees. Even deep in the cave, we all felt the temperature drop even further as the Chill Squall moved through; snatches of wind fingering in as if it was trying to pluck us out of our hole.
Finally got the idea for an orcish currency:
A cold-hammered piece of raw iron, resembling some kind of a dagger. The Dagger is easy to carry, hard to forge, may be used as a crude weapon in case of emergency AND the iron being a valuable resource... may be used directly for weapon-making. May be carried openly on the belt of a mighty Orc. A new insult: 'to beat someone with someones money' . Self-explanatory.