Also called the "Banshee Veins" or "Wailing Digs" the term "Singing Mine" refers to the Vibrosteel mines found predominantly in Sahar and Orientalis.
Existing at once in the mortal plane and upon the plane of Fire, the Grand Pyre of the Phoenix is the ultimate testament to the power of the Lord Zevarith.
What if interplanar travel was not as simple as a spell. What if it required the use of certain gates, which were not only hard to find, but difficult to access, and dangerous to use.
Sesna’s Volcano holds one such gate.
A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.