Dark Side of the Rune

Publisher's blurb: Heroes face an outsider enemy in a Far Realms keep. The portals attaching it to both the Far Realm and the Jundarwood Forest are the only things continuing to cause danger to the people of the Border Kingdoms. Can you take down the portals and make your way home safely? A Four-Hour Adventure for Tier 4 Characters. Optimized for APL 18.