click wheel, click the reward button. it shows you everything.
if you read what it says, it says you get to select a piece. aka 1 piece. tayberrs selection box says it contains a (super : tayberrs set) ITEM of your choice and thus it’s also only a single piece. wording is key, sometimes they miss it up but if it sounds too good to be true, you can just assume the worst possible outcome and you will be correct 99% of the time when it comes to dfo.
however the epic box itself has a chance to give you 6 different things and knowing their rng. getting the actual selection boxes is like a 1 in a million chance.
i personally wouldn’t bet anything on getting one of those. i mean you are not even guaranteed to get a epic box upon spinning + upgrading 3 times.
most of the rewards are pretty trash, this event was most certainly made with 10+10 and old rate of progression in mind. only acceptable rewards are the epic ones, everything else might as well not even exist.