Transmogrification is the process of combining three +3 items to create a +4 item, giving it the maximum possible stats that part can get for its BOT type and having its level requirement changed to Lv 100. This system allows players to collect their favorite piece of armor and power it up to the point it can be used for all content. Elite items only need to be combined once for them to Transmogrify and match the stats of a Lv95+3 set. Battlemesh items can’t be XMOGGED.
Transmogrification is also referred to as XMOG.
XMOGGED pieces flash blue so that they can easily be spotted as XMOGGED and not a random low level set.