As the small group of mercenaries settled down for the night, they failed to notice that some small pieces of barbed wire sticking out of the ground nearby were moving like tentacles.Until it was too late and they woke to feel it clutched around their throats and squeezing hard. As their blood spilled upon the ground the Barbed Arms had claimed yet more victims.
Other improvisational weapons/tools:
Icicles are useful as daggers,
Bag Of Holding filled with copper pieces used by chucking the contents at foes, (by strolen)
sleeves make useful garrotes. Ya can't cut anyone's neck, but you sure can choke 'em!
Flaming Logs make great clubs, (any Barbarians out there?)
and Bee hives are very effective when thrown at a mob of enemies. :-)