Porta Clausa

Name Porta Clausa
Cooldown at-will
Action standard
Range ranged
Special DC 15+
Power porta
Class arcanist
Category Control

At-will, standard action, ranged, DC 15+; you target an existing portal, gate, or dimensional rift within 60 feet and seal it shut. The portal collapses and cannot be reopened for 1 minute. If the portal is sustained by another caster's concentration, they must make a spellcasting check against your spell DC to keep it open.