Trigger: An icewall is here, blocking passage to the (\w+)\.
Script: display(matches)
Check 'match all'

Argent Lane passing the house of Damaris.
Sunset falls upon the arid landscape, the reddish light filtering across the horizon. A
way to the east, Argent Lane arrives at a junction with the fabled Parade of the Founders.
Southwards, the monotony of endless residences is broken by a stunningly designed and
built house made from deadfall. Huge beams of twisted wood arch upwards, creating the
entrance to this cream-coloured house, a large window gracing the front. A runic totem is
planted solidly in the ground. A golden sign hangs upon the wall of the house. An icewall
is here, blocking passage to the south. An icewall is here, blocking passage to the
northwest. An icewall is here, blocking passage to the east.{
  "An icewall is here, blocking passage to the south.",
  "south",
  "An icewall is here, blocking passage to the northwest.",
  "northwest",
  "An icewall is here, blocking passage to the east.",
  "east"
}

Loop through matches table to parse out directions with icewalls.