Salomor rules Kazül from its coast, and the thing that makes him king is on his hand. The ring is Ederhi work, pulled out of the deep Jahazai two generations before his birth and bought up the line of his house at the cost of most of what the house owned. It summons. What it summons answers Salomor and answers no one else alive, and that single fact is the whole architecture of Kazül's throne. The caste laws, the glass tariffs, the trapped laborers and the comfortable nobility all rest on the plain understanding that the king can call something the kingdom cannot.
He did not inherit the ring so much as the ring accepted him. The story the court tells is that Salomor's father held it for thirty years and it never once answered him, and that it woke the first time his son touched it. Whether that is true or throne-flattery, the king has never said. He wears it constantly. He summons rarely, and in public almost never, which the canny read as economy and the fearful read as restraint.
The live question in Kazül is succession. Prince Edric is the named heir, but an heir to Kazül inherits a kingdom whose authority is an object, not a bloodline, and no one knows whether the ring will answer Edric or simply go quiet the way it went quiet for Salomor's father. The nobility who profit from the present order would like very much to know before the king dies. So would Edric. So, in their own way, would the laborers who have nothing to lose if the throne's one real argument stops working. Salomor knows the question is being asked and has done nothing to settle it, which is itself a kind of answer.
Game mechanics
The ring of Salomor — an Ederhi binding-key (artifact, not its own entity). Summons a single bound servant: a thing of dark Ederhi glass, roughly humanoid, that obeys spoken command from the ring's bearer and no one else. It can be summoned and dismissed at will but tires the bearer when held present for long stretches (treat sustained summoning across hours as accumulating exhaustion). It does not cast magic and does not spend the bearer's life — operating the ring is template-execution, like turning a key, not generative casting. The servant is durable, strong, and slow, and it cannot leave the bearer's presence by more than a stone's throw before unraveling back to inert glass.
The ring binds to one bearer at a time through an Ederhi mechanism no living artisan understands. It will not answer a second person while its bound bearer lives. On the bearer's death it goes inert until it "accepts" a new one, which may be the named heir or may not, and may take years.