Hold Portal

This spell magically bars a door, gate, or valve of wood, metal, or stone. The magical closure holds the portal fast, just as if it were securely closed and locked. Any extra-planar creature (djinn, elemental. etc.) with 4 or more Hit Dice can shatter the spell and burst open the portal. A wizard of 4 or more experience levels higher than the spellcaster can open the held portal at will. A Knock spell or a successful dispel magic spell can negate the hold portal. Held portals can be broken or physically battered down.

School: Alteration
Level: 1
Rarity: Common

Range: 20 yards/level
Component: V
Duration: 1 round/level
Casting Time: 1
Area of Effect: 20 square feet/ level
Saving Throw: None