Arcane Sanctum

Arcanists usually create a space for themselves to perform rituals and focus their energies. Different traditions handle this differently, from sanctified churches to altars at home. In each case, it binds the energies used into the very fabric of reality, aiding any appropriate focus.
Establishing a true Sanctum takes time and pouring a lot of energy into its construction. This is often done through daily or weekly prayers or sacrifices.
Once a Sanctum is established, the person or persons who created it can more easily reach for the Branches they have infused into it. Others who they let in can create a link to the Sanctum more easily than creating one from scratch. Defiling the Sanctum might easily break the effect completely.