Rope of Mending

From Xanathar's Guide to Everything, page 138.

Description
Wondrous item, common.

You can cut this 50-foot coil of hempen rope into any number of smaller pieces, and then use an action to speak a command word and cause the pieces to knit back together. The pieces must be in contact with each other and not otherwise in use. A Rope of Mending is forever shortened if a section of it is lost or destroyed.