Mythic w/ "VERY RARE" socket & Mythic Warforged w/ tertiary stats on Warlords Black Market Auction House : r/wow
Mists of Pandaria: Valor Point and Gear Acquisition Preview - Wowhead News
Gear
How to add sockets to gear in Shadowlands
Sockets and enchants on the character screen. My friend couldn't find an add-on that does this while keeping the default UI, so he made his own. In case more people are interested: