There also appear to be several missing commas in that message, as well as a poorly formatted sentence:
"Arneson controls more than men, more than dragons, but the titans themselves."
The clause starting with 'but' either lacks a verb or is improperly connected to the main clause of the sentence. An alternative might be:
"Arneson controls not only men, nor mere dragons, but the titans themselves."
Another alternative:
"Arneson controls more than men, more than dragons: he controls the titans themselves."
Revised message that I believe is somewhat better, grammatically:
The compound is full of what you could consider soldiers, except [that] they are better armed.
"Turn back, magician." An armored sentry yells to you, "Arneson controls more than men, more even than dragons: he controls the titans themselves. Should you irritate him, he will remove you from this world."
Question about this, though: why should I not consider the well-armed group to be soldiers? Being well-armed merely makes them high quality soldiers or perhaps fighting members of the nobility (i.e., champions).