Dubbed also as “Tales of Zestiria the X Prologue it takes place before the series and features a certain event that happened with Alisha the princess and her few comrades and why princess Alisha decided to find shepherd and why did she ended up in that Ruin at the begging of the first episode..... The main star of this prologue was Alisha although the MC of the series is Sorey the shepherd as i mention it just features a certain event that happened with Alisha on her journey The animation was outstanding as obvious because it was created by ufotable studios ..... well what canyou expect from a prologue ? Its basic purpose is to give an Idea of the past, character's background and a little information about the events that caused the story of the anime to take place

So as for those purposes this prologue achieved it's purpose completely and gave everything which was expected from it so for that it deserve a 10/10 !!!