I'll give you a lovecraftian stanza:
Thro’ the ghoul-guarded gateways of slumber,
Past the wan-moon’d abysses of night,
I have liv’d o’er my lives without number,
I have sounded all things with my sight;
And I struggle and shriek ere the daybreak, being driven to madness with fright.
Nemesis — Howard Phillips Lovecraft
Ghoul is a noun, and guarded is the past participle of to guard. He combined both words to create an adjective to describe his "gateways of slumber" properly.
But then you have wan-mooned. An adjective plus the past participle of to moon or some bizarre usage of the noun moon to explicitly say that the "abysses of night are full with moons."
That's where I think: What's the logic behind this after all? To which extent I have the power of freedom to create my own bizarre adjectives by combining random words?
I could replace the second verse with:
Past the wild-river’d clouds of mars
It would not make any sense, but the logic of wild-river'd is pretty much the same of wan-moon'd.
What's the insanity-guarded logic/rule behind this?