This 50-foot coil of silk rope has a silvery sheen.

This silk rope becomes as hard as stone (hardness 8, 15 hp) when you speak the command word (but remains just as climbable as normal). A second command word returns the rope to its normal composition. The rope retains its exact shape when hardened (which adds 5 to the DC of Escape Artist checks made to slip free of it). If the rope is ever broken in either form, it is destroyed.

Prerequisites: Craft Wondrous Item, stone shape.
Cost to Create: 400 gp, 32 XP, 1 day.