Are you saying that you're fine with last night's episode on the assumption that there's another shoe to drop on that plotline?
I don't know why you'd give the show that much credit. It is simply not plausible that an uber-demon who has been thinking about this for 6,000 years (and who, mind you, has the wherewithal/luck/alchemy skill to have dragon-grade chains lying around) falling for a trap that could have been pulled from a random episode of Mighty Morphin Power Rangers.