i'm not so sure what to write in a review, the couple of stuff i have to say are, i don't understand why people are hating on this spinoff so much, it's meant to show you a part of the story not visible when you watch bell and his adventure, everything about the demi spirit and Revis the entire story that will most likely will be adapted in season 4 or 5 the new species everything there is that we didn't see in the main series was adapted here overall it had pretty solid animation, voice acting was solid aswell sound effects were good overalli believe it was meant to give you the story about Revis and what lies deeper within the dungoen