Warp Sense

The warp sense, a spell finds and analyzes the gates and portals of the planes. It allows the being touched to sense any gate or portal, active or not, along a 60-foot path, dead ahead. Scanning in a single direction (out of four in a complete circle) takes one full round, so the recipient can shift directions while scanning. However, the empowered creature cannot move in any other way without disrupting the spell; full concentration is required.

Once a portal is detected, the creature can try to deduce where the other end discharges and the key required to use the portal, if any. Each piece of information requires a separate saving throw and if either is failed, a; nothing further can be learned about that portal. The player can state which question will be asked first. If the creature has actually seen the portal in operation, a +2 bonus is applied to the check.