The Lost Metal is the seventh book in the Mistborn saga, and the fourth and final book of what it's known as the second era of Mistborn, by Brandon Sanderson. And let's be honest, knowing this book was meant to be the conclusion to one of the major arcs of Cosmere, the expectations were really high, but Sanderson delivered, making me feel even more hyped for future books situated in the Cosmere, wondering if they will get at some point an ambitious crossover between sagas.

I have to admit that at first glance, I wasn't a big fan of the second Era of Mistborn, especially during the first two books. It's true that with The Bands of Mourning my perception of these characters improved, and some characters as Marasi improved so so much; The Lost Metal definitely has elevated my perception of this arc of the Cosmere, moving it among my favourite ones, because it wraps the end perfectly, making it really memorable.

This book starts six years after the end of The Bands of Mourning, in a difficult moment for the city of Elendel. The tension between Elendel and the outer cities is growing, and the demands for sovereignty are becoming a big problem for the Elendel government. At the same, the hunt for the Set, the shadowy organization, continues. After Waxilliam accidentally discovers a new type of destructive explosion, he has to assume one more time his paper as Harmony's Sword, and to fulfill that role, he will need the help of Marasi, Steris, and Wayne. Throw into that mix that Harmony's power is getting blocked in Bilming, one of the outer cities, and you get a race against time, in which our protagonists must stop Telsin's plans before they get to a port.

In the style of other final books by Sanderson, we get a slow start, which gets cooked to lead us into a really high-stakes ending, in the same way, The Hero of Ages did with the First Era. We are also reading one of the most ambitious crossovers in the whole Cosmere novels, with several references that are easily spotted by fans of the saga. Also, the fact that many of the first Era characters get implied in the plot of this book is a nice touch (I have to admit, I will always be part of the Survivor's church).

Sanderson gets all the elements to reach the final part, and unleashes the perfect Sanderstom, making the last half of the book really frenetic and emotional. Again, drawing the parallelism with The Hero of Ages, The Lost Metal manages to deliver a great climax to this arc of the story. I can't count how many times I was surprised by another twist in the plot, and how it felt so satisfying and emotional the ending of this story. 

The Lost Metal is the cherry on top of how great the second era of Mistborn has been. It definitely closes some of the plots that were opened with our characters, and I can say that it was worth waiting six years for its publishing. A superb ending that made these characters ascend to the top of Sanderson's character.