Hold Portal

Abjuration (Ward) Tier: 1 Components: Verbal Casting Time: 1 major action Range: 120 ft Target: One portal, up to 20 square feet/level) Duration: 1 minute/level Saving Throw: None The door slams shut behind you, cutting off your pursuers. A moment later, you hear their banging on the door, but it hardly shudders.

This spell magically holds shut a door, gate, window, or shutter of wood, metal, or stone. The magic affects the portal just as if it were securely closed and normally locked.  A successful dispel magic spell can negate a hold portal spell.For a portal affected by this spell, add 5 to the normal DC for forcing open the portal.