Necro? Guro? Snuff? I hardly see any of that here. The closest thing I might see to the warning is the snuff if we use our imagination and actually think the first woman got suffocated to death, but it looks more like she passed out.
There's currently no guro or necro to be seen. Maybe there's a continuation at a later date?
@Rhystil the entire series is about Goblin capturing, torturing, cooking and then eating these characters, putting that warning helps so people don't click by accident and see content they dont want to see. Its the kind of content that I as an artist do the most.