You conjure a portal or doorway that links an unoccupied space you can see within range to a precise location in the mortal or fey realms—such as Midgard, the Shadow Realm, or the Summer Lands—that you have stood. The portal is a semicircular opening, which you can make 5 to 20 feet in diameter—it is often cast under a bridge, archway, or even under roots or branches of a large tree. You can orient the portal in any direction you choose. It has a front and a back on each plane where it appears. Travel through the portal is possible only by moving through its front. Anything that does so is instantly transported to the other plane, appearing in the unoccupied space nearest to the portal. The portal lasts for the duration.   Deities and other planar rulers can prevent portals created by this spell from opening in their presence or anywhere within their domains.