Dave: Combine broken Caledscratch and ruby contraband.
You combine a couple more items you got from future Dave's loot stash. The broken form of CALEDSCRATCH, and some RUBY CONTRABAND, whatever the hell that is.
The resulting item costs a fortune. You have no idea what it is.
Hey check it out. Every week we'll be revealing some new troll characters from Hiveswap until Act 2 is out. Follow the Troll Call here, and meet the first two here. Expect a few more surprises like this to drop in coming weeks.