Translations:Rift ward/25/en
From Vintage Story Wiki
Place the rift ward on the ground. Then insert a temporal gear as fuel in the rift ward. It will rotate and make some noise. The rift ward will "block" temporal rifts present as well as preventing new rifts from appearing for 14 days in a 30 blocks radius. Its information box will tell you how many rifts it has prevented so far and how long it will be operating before you need to refuel it.