Shadowmarch

Shadowmarch is a High Fantasy series by Tad Williams, originally conceived as a web-based novel but turned into the regular kind halfway through the first volume.

The story starts out in the eponymous Shadowmarch castle, capitol of the March Kingdoms on the continent of Eion. King Olin Eddon, ruler of the March Kingdoms, is being held for ransom, and his family (pregnant Queen Alissa, eldest son Kendrick, and twins Briony and Barrick) quickly get caught up in a web of intrigue as some of their ambitious retainers try to use the resulting power vacuum to their own advantage. Meanwhile, the Qar, an ancient race of fairytale creatures, are plotting their revenge against mankind for driving them out of their ancestral lands, and on another continent, the mighty (and quite mad) Autarch Sulepis hatches plans to conquer Eion and add it to his already immense empire.

Tropes used in Shadowmarch include:

A God Am I: Interesting subversion with Autarch Sulepis. Although he cultivates the public image of God-King, privately he knows very well who the true gods are.
Anyone Can Die: Oh dear.
Ax Crazy: Daikonas Vo, as made fairly clear in the short sequences when we hear his thoughts (or his muttering). He manages to pass as "normal" (in a blood-thirsty, seriously creepy way) most of the time though.
Badass Abnormal: Most of the Qar, really, but Yasammez deserves special mention.
Badass Normal: Shaso Dan-Heza, Ferras Vansen, Daikonas Vo, Prince Eneas. Barrick later takes a level in badass and qualifies too.
Badass Princess: Briony definitely qualifies.
Batman Gambit: Zosim's plan to mislead Sulepis. It works.
Beneath the Earth: Funderling town and the labyrinth of caverns below Southmarch castle.
Big Bad: Zosim, the in-universe Trickster Archetype god.
Bittersweet Ending: The Big Bad is defeated, but at a terrible death toll. The Qar survive, but are thoroughly decimated and seem fairly convinced they won't last much longer. The Xixian invaders are defeated for the time being, but it seems like it's just a matter of time until another Autarch bent on world conquest crops up. Briony and Vansen confess their love to each other, but propriety prevents them from marrying. Barrick leaves Southmarch for Qul-na-Qar together with Qinnitan, and the latter is comatose and doesn't seem likely to wake up any time soon. Chert and Opal survive, but Flint decides to leave them, a decision that leaves Opal heartbroken. Also the fact Barrick and Briony may never see eachother again is kind of a Tear Jerker. Also the Funderling's Sacred Mysteries and temple have been filled in by the ocean. Beetledown dies making a Heroic Sacrifice. And Tinwright doesn't get the woman he loves, even though he tried so hard to keep her safe.
Blood Knight: Yasammez. Barrick gets these tendencies after getting the Fireflower.
The Caligula: Sulepis. Most Autarchs are this.
Character Development: Plenty, even for relatively minor characters - something that's to be found in nearly all Tad Williams novels.
Deadpan Snarker: Barrick (somewhere between this and a Knight in Sour Armor).
Determinator: Daikonas Vo is the evil example, chasing Qinnitan Across Hierosol, a fair way through the lands around Southmarch, he doesn't catch her in the end, even though he hadn't eaten in a long time, had vicious pain coursing through him and the fact he had gone quite mad, he doesn't let him slow him down much. Ferras Vansen is the good example, staying by Barrick's side to the point where he actually goes to the afterlife, he ends up okay, but he takes his promises VERY seriously. Also survives the Battle against the Autarch, despite being hopelessly outnumbered, having few trained fighters and not being able to see too well in the dark.
Disproportionate Retribution: Torture, death, or severe beatings await anyone who does anything against an Autarch, whether is be, coughing too much om his presence, to helping one of his hundreds on wives to escape
The Dragon: Vash in an administrative sense, and Vo in a hitman sort of sense to Sulepis
Earn Your Happy Ending: More like earn your Bittersweet Ending, but yeah. Considering the bad end would have everyone enslaved or killed by an Ax Crazy fire god, could be worse.
Elemental Embodiment: Each of three non-Human races south of Shadowline represent one element: Skimmers inhabit areas near sea and worship Erivor (god of waters), Funderlings dwelve in underground tunnels and worship Kernios (god of earth and death), while tiny Rooftoppers live in high places and worship Perin (god of skies).
The Emperor: The Autarch.
Everybody Hates Hades: Subverted. Kernios is an obvious paralell to Hades, as a god associated both with death and the underground, and throughout the series hints are dropped that he's actually the Big Bad but it turns out that he's soundly in hibernation with most of the rest of the pantheon- Zosim the trickster god, who was impersonating him, is the Big Bad. The Autarch, who was counting on the god he was dealing with being Kernios, gets a major Oh Crap moment when he realizes the truth.
Evil Overlord: The Autarch.
Evil Versus Evil: In the last volume of the series, there is a war between autarch Sulepis and Hendon Tolly.
Eyes of Gold: Sulepis has them.
The Fair Folk: The Qar.
Finger-Lickin' Evil: Zosim does this. ("Splendid! It tastes like worship!")
Five Races: Humans, Qar, Skimmers, Funderlings, Rooftoppers. Unlike most examples of this trope, there's little in the way of fundamental differences in outlook/philosophy between the different races. While there are significant tensions between some of the races, these are mostly caused by cultural differences, xenophobia and a history of mistrust and conflicts.
Get a Hold of Yourself, Man!: Prince Barrick receives one from Captain Vansen.
Godzilla Threshold: The Qar consider the idea of a live god walking the earth again bad enough that they plan on using the Fever Egg (think fantasy version of a hydrogen bomb) to stop it from happening, even though doing so would render most of a continent uninhabitable.
Heroic Sacrifice: Gyir does this killing Jikuyin, blowing himself and the demigod up, Beetledown does it to save Brother Nickel. Also Yasammez stalls Zosim, dying in the process, so Chert's plan can come to fruition.
It Got Worse: Whenever it looks like Qinnitan is about to catch a break, this is what happens.
Jerkass: Chert's brother, Brother Nickel, Hendon Tolly switches between this and Complete Monster, Yasammez is this a bit.
Kansas City Shuffle: So who's the actual Big Bad? Not only are there several candidates, they also try to out-wit each other, and then the actual Big Bad turns out to have misled everyone else from the very beginning.
Lady of War: Queen Saqri. More literally is Yasammez, who seems to make war her goal in life and carries a pendant called the Seal of War.
Loads and Loads of Characters: And nobody is safe.
Magic Mirror: Used to communicate with the sleeping gods. A lot of the mirror-users don't seem to be aware of this and get manipulated by those gods as a result.
The Man Behind the Man: Zosim is the man behind Sulepis who is the man behind Hendon Tolly.
No Ontological Inertia: The Mantle disappears after Yasammez dies.
Not Quite Dead: Gailon Tolly, it turns out. This is something of a subversion - earlier hints lead the reader to think the mysterious wanderer is Shaso.
One-Man Army: Gyir The Storm Lantern, Yasammez, later Barrick and Ferras Vansen and Saqri
Our Dwarves Are... Actually Different: The Funderlings, who share the love for stone working / mining / digging, but are otherwise fairly similar to humans and a lot more varied than the usual one-note fantasy dwarf race.
The Reveal: Happens on a regular basis.
Royals Who Actually Do Something: examples include Syanese price Eneas who, despite his young age, is experienced battle commander, princess Briony who learns many skills during her adventures (such as acting and knife fighting) and king Olin who personally took command in many battles. Also Ynnir And Saqri, the Qar royalty.
Smug Snake: Daikonas Vo treats everyone he meets with contempt and, while certainly capable, tends to be somewhat overconfident. Somewhat subverted in the fact he didn't really ever fail, and went insane.
The Sociopath: Daikonas Vo. Has a very limited emotional range, cannot relate to people on any level, and hates everyone. Most White Hounds are this.
Standard Hero Reward: Subverted. Vansen gets the Princess but not the kingdom.
The Stoic: Vo again. Also Barrick after getting the Fireflower rarely shows much emotion outwardly.
- Not So Stoic: The poison really bring out his Axe Crazy side.
Storming the Castle: One of the several concurrent battles during the climax.
- Also the autarch's storming of the Mysteries, which quickly becomes a pitched battle.
Took a Level In Badass: Barrick after meeting the 3 sleepers. Technically gets another when he gets Ynnir's Fireflower, giving him millenia of knowledge and experience, which makes him a One-Man Army.
Touched by Vorlons: Barrick after accepting the Fireflower from Ynnir.
The Unfettered: Daikonas Vo does not have any scruples about completing the mission given to him by the autarch.
Unwitting Pawn: Chaven, unfortunately, he ends up being controlled by Zosim and completes his Evil Plan.
Voluntary Shapeshifting: The Qar are able to change their form (the "First Gift") - which is why they come in all shapes and sizes. Only the Changling tribe retain this.
We Have Reserves: Autarch's attitude towards his troops. During the siege of Hierosol, he ordered full scale attack through the breach in city's walls, despite being warned of massive casualties it will cause among his army. He explained that his soldiers should be happy to fight and die for their autarch.
What Happened to the Mouse?: Theron and the boy are just about the only characters whose final fate isn't confirmed in a 100 plus page section following the climax which otherwise thoroughly averts this. Also, Raemon Beck, who pops up at the end, with pretty much no explanation.
- Pelaya's and her family's eventual fates are also left unresolved.
The Wise Prince: Prince Eneas of Syan.