Supernatural Viking massacre summoned via song during a music festival.
Gore doesn‘t make a horror. You need at least a whiff of atmosphere. You also must make the reader care about the characters. And, most of all, you need writing that shows the horror instead of telling the reared “oh, look, look, this is sooo scarry.”
(Honestly, my brain had turned off by the end. I didn‘t even know who everyone was.)
Very cool idea. Crap execution.
2/5