The Fallen Leaves of Mithrendain
In addition to the local wildlife the portal malfunction has ALSO attracted the attention of a group of trans-planar guardians known as the Weave Wardens. A small, but powerful first response team is dispached to assess the damage to the space/time continuum, and to also check for any contraband (life forms or objects that have been deemed too powerful or dangerous to leave their native plane)
5 or 6 Eladrin teleport adjacent to the party in a surprise round, and attempt to grab or otherwise immobilize the party. The leader Enkoro, then questions the party about the conditions of their mysterious cross-planar journey. After being convinced that they are not carrying contraband, Enkoro and his team depart, suggesting that the party head for nearby Mithrendain if they would like to get back home.