The manticore being helpful out of the blue was a rather unrealistic plot turn, he should ask heroes to do something for him before helping out in my opinion.
The dead friends being turned into spiders was a good plot twist trough - seeking resurrection is nice but Death should not be easy to cheat.
Haha that was the joke, Mooshi does ask them to do something and they're like fuck! Not another fetch quest! And then he's says nah I'm just messin with ya