void main()
{
object oPC = GetEnteringObject();
object oTarget = GetWaypointByTag("nasgarthport");
location lTarget = GetLocation(oTarget);

if (GetItemPossessedBy(oPC, "NasGarthStone")!= OBJECT_INVALID && GetHitDice(oPC)>=18)
   {
   AssignCommand(oPC, ClearAllActions());
   DelayCommand(2.0, AssignCommand(oPC, ActionJumpToLocation(lTarget)));
   ApplyEffectAtLocation(DURATION_TYPE_INSTANT, EffectVisualEffect(VFX_IMP_DEATH_WARD),lTarget);
   }
   else
   {
   string sDeny="You must possess an NasGarth Stone and be 18th level to use this portal";
   SendMessageToPC(oPC, sDeny);
   }
}