ITT: Post an image and a scenario that goes along with it, then others react and say what they'd do in that situation.

This giant demon dude offers you his leash and his servitude, making himself your slave. Anything you want he'll do without hesitation, even murder. He has super strength, durability, senses and can disappear and reappear using shadows/darkness. When you don't want him around he vanishes into your shadow and waits to be summoned again. He's gruff and quite, but he's not uncaring or an asshole.

Their is no catch. If you accept his offer he will be your pet/slave until you dismiss him or die, and he takes pleasure in serving you; its just the way he operates. Do you accept his servitude and take his leash?