So from what I understanding this is a fan reconstruction of a chapter of Warrior U that was never finished. The first few pages are official pages while the rest are either remakes of low quality thumbnails or original pages based on the draft.
Links:
https://warrior-u-preservation.tumblr.com/post/682441534219665409/ambrosia-arc-masterpost
https://alexscorpius.gumroad.com/l/jkhdz?layout=profile