The exact method to transition from Truegold to Underlord can be a bit of a mystery for some sacred artists, and many are never able to cross that line. It requires you to know yourself, and your motivation for following the sacred arts. Once that personal insight is achieved then the sacred artist must reach outward to the vital aura all around them, become infused with soulfire, and be reborn as an Underlord. It is certainly a coveted rank and desired by all Truegold sacred artists, including Lindon, but for Yerin, this step in her progression has literally become a matter of life and death. After sustaining irreparable damage to her lifeline in a battle, Yerin's life has been shortened to the point where her death is imminent, unless she manages to be reborn during the transformation to Underlord before her lifeline runs out. No pressure.

Long ago, the Monarch Northstrider created a world of his own. This pocket world, Ghostwater, is where he kept some of his most valuable items; however, that pocket world is now dying. The stability of that world was damaged in the events of the last book, and the Skysworn are determined to retrieve some of the valuables before they are gone. It is not clear how long that world has left, but Lindon, Yerin, and Mercy are all part of the team sent to retrieve those items. It doesn't take long for them to become separated, leaving Yerin and Mercy stuck outside, with Lindon trapped on his own inside the dying world. So is this a worthy story or is it just a contrived way to split off Lindon and send him on a side quest that allows him to catch up in power to Yerin?

The time has finally come for Lindon's duel with Jai Long, and despite all Lindon's training and advancement in the path of the Blackflame, it is still not even close to being a fair fight. Not even the fact that Lindon healed Jai Long's sister from her crippling affliction turned out to be enough to spare him from his fate, which has been orchestrated from the start by Eithan Aurelius. This is all part of Eithan's plan to elevate the Aurelius family above the Jai family and this duel is merely a single move in a much larger game. None of that matters to Lindon because it is very likely he won't be alive to find out if Eithan's plan actually works. Knowing this, Lindon has has no plans to fight fair, but unfortunately for him, Jai Long also has some tricks of his own prepared.

Now that Lindon and Yerin are both part of the Aurelius family, they finally have the support they need to grow their power as Sacred Artists. Of course for Lindon, that growth is likely to come too late as circumstances have resulted in him being committed to a duel to the death in one year's time against Jai Long, a much more powerful sacred artist. With the support of Eithan Aurelius, Lindon might be able to close the gap with Jai Long's current rank, but unfortunately for him, Jai Long is also growing in power and there is no possible way for Lindon to catch up in time. Lindon tries to focus on his training, but political maneuvering between the Jai clan and the Aurelius clan are likely to get in the way.

Now that Lindon and Yerin are no longer constrained to the Sacred Valley, we learn just how backwards that isolated location was. The Elders of Lindon's clan were Jade rank sacred artists and they had amazing powers, but out in the larger universe, Jade is nothing. The next rank up, Gold, has three levels of its own, Lowgold, Highgold, and Truegold and there are plenty of ranks above Gold. In fact, outside of Sacred Valley almost everyone is at least Lowgold, so Lindon is even more of a fish out of water; however, he does learn that he is not actually unsouled. This means that Lindon actually can progress through the ranks, if only he can find someone to teach him.

No one has left Sacred Valley in a hundred generations, and it is here than Lindon is born within the Wei clan, one of three clans to call the valley home. All natural things in Sacred Valley exude vital aura, and Lindon's people are sacred artists capable of cycling that aura into madra within their bodies. There are many aspects of madra and a sacred artist will typically use only one or two of them, depending on the Path that they follow. Twice a year the elders of Sacred Valley test their children, starting as early as age six, using a bowl of pure madra, the material from which souls are made. If the madra clings to a child, that child has the soul of an enforcer and will become a warrior, if the madra retreats away from a child, that child will be a striker, if the madra rises then that child will be a ruler, and finally if it freezes, that child will be a forger. Lindon begs for the madra to freeze as he puts he his hand in the bowl, as wishes to follow the path of his mother and create wondrous items of pure madra. He places his hand in the bowl and nothing happens.....Lindon is unsouled.

Early on in this series, Donut received a magical crown and of course she put it on before reading the description. The warning on the crown stated that the wearer would become a member of the Blood Sultanate and would not be able to leave the 9th floor of the dungeon without killing every other member of the Sultanate. This was a permanent liability as removing the crown does not negate the effect. She eventually replaced the crown, but that too was a mistake, because it allowed that same crown to be forcibly placed onto the head of fellow crawler Katia in a later book. At that point there was no way that both Donut and Katia could both reach the 10th floor, but it was a problem for another day. No longer. The 9th floor, known as Faction Wars, is finally here and it is one of the most deadly floors in the dungeon. Add on the Donut/Katia situation and there is no way that Carl makes it to the 10th floor without losing someone he loves.

The 7th floor of the dungeon was abruptly destroyed, so instead of the 7th floor this book takes place on the 8th, known as The Ghosts of Earth. Each team's leader must pick a location to start, and despite being well prepared for the Bahamas, Carl and Donut wind up in Cuba because Donut isn't exactly great at geography. Because no crawlers were eliminated on the aborted 7th floor, the AI has made the floor extra deadly in an attempt to dwindle down the number of crawlers before the 9th floor Faction Wars. This level requires the crawlers to collect monsters ala Pokemon in order to build out the decks they will use to combat other crawlers and NPCs in a real time version of Magic the Gathering. Of course, every part of this is done in a ridiculous over the top manner that culminates in an insane multiplayer card battle with everything at stake.

Viv is an orc babrarian, and after many years of adventuring she is ready to hang up her broadsword to pursue her dream of opening a coffee shop. Ever since she first smelled the gnomish drink she has been making plans and when her final job has her slaying a scavern queen she knows the time has come. According to an obscure legend the heart of a scavern queen will guarantee the success of its owner. Things seem to be going well until one of her old adventuring group comes seeking the heart and stirs up the local crime lord against Viv. Being a shop keeper is certainly more complicated and dangerous than Viv expected, but with help from her friends Legends and Lattes might be a great success.