Rise of the Runelords
This Thassilonian ruin was recently discovered by your group to be a magical entrance to the RuneForge. It’s location was found on the southern slope of Rimeskull mountain. The Sihedron Circle is a ring of seven ten-foot-high stone heads, angled towards each other with their mouths open. Casting the appropriate rune magic upon each head will grant you temporary access to the RuneForge.