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.
When running a new party, get around the question of plot density by having the first discovery to be a deck of fate, or whatever you call it. If you use a real deck, you should definitely stack it to have the desired outcome, which is to curse the party to attract weird things to happen and involve them. This should not be told to the players at the time, so that they won't just up and try to get themselves 'decursed'. Though quite why they would want to is beyond me.