Idk maybe like a dio boss reskin or something lol

Its not in-game, i believe you can just get corpse part rewards now (from heaven bosses)

Oh lol well odd should tell us that

Bruh, TA4 boss is a boss Odd teleports random people to and they have to win against it and if they do they get four items of their choosing.

Random ppl on the discord, or just random people