Legacy cosmetics are glowing versions of a character's default clothing.
These outfits were earned by prestiging a character prior to the cutoff date in late 2016. Originally earning Bloodpoints and completing Bloodwebs took much longer, so when it was made easier to level up and prestige, these outfits were added to recognize the hard work and dedication of those who prestiged before the change.
Ever since, legacy cosmetics have been unobtainable. We do not intend to bring back legacy cosmetics out of respect to those who earned them.