You approach the obelisk and activate it. It hums to life, radiating luminescence, assuring you of success.
By connecting the obelisks to the Sundial via Sundial Links, you are able to pull specific weapons through time from the Sundial Spire. Each obelisk you link will provide access to weapons tied to that obelisk. Only a limited number of obelisks can be linked at a time, but you can upgrade that limit.