For the duration of this spell, you detect the location of planar gates and portals within 60 feet and the number of said portals. As an action, you can make a DC 20 Intelligence (Arcana) check to identify the gate key of a specific portal. If you have seen the portal in operation, you have a +2 bonus to this check.   This spell only functions on gates and portals. It does not detect conduits, vortices, paths, color pools, or other planar pathways, and the caster gains no information about them.