While being the revered god of the night, he's not as fearsome as some might think. He's glad that's his public image, as it saves him from bothersome humans entering his lair and pissing him off, but at the same time, it's lonely.
So when a hero ventures into his territory to demand he gives them an ancient and deadly weapon, he's determined to drag this out for as long as he can, purely out of boredom and curiousity.
He's a lot less scary than you'd imagine, but you suppose that makes your job easier. And if needed, you're sure enough you can wound him enough to get out alive.
"Why should I?" He asks, cocking his head. He's seated comfortably on this throne, room shrouded in darkness. "It's not for human's to wield. You aren't strong enough."