Seal Portal

SEAL PORTAL
Abjuration
Level: Sorcerer/wizard 6
Components: V, S, M
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One interplanar gate or portal
Duration: Permanent (D)
Saving Throw: None
Spell Resistance: No

You cast a silver bar in the direction of the
portal and it vanishes, becoming a semitranslucent
net of silver magic that briefl y
encases the portal before disappearing.

You can permanently seal an interplanar
gate or portal. The spell prevents
any use of the portal, although seal
portal can be dispelled by a dispel magic
spell. A knock spell does not function
on a sealed portal, but a chime of opening
dispels seal portal if seal portal was
cast by a spellcaster of lower than
15th level.

Once a portal is opened, seal portal
does not remain in effect and must be
cast again.

Material Component: A silver bar
worth 50 gp.