"The Legendary ring procs that have been datamined from the 6.2 PTR are from an old design. A new design is planned for a future PTR build."
Not the intended proc, placeholder is placeholder.
https://twitter.com/WarcraftDevs/sta...00022727278592
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It definitely will be this regardless of what the proc is. The rings will be far superior to anything in that slot and if you don't have one you probably won't find entrance to heroic or mythic Hellfire raids very easily.
This is the negative side to having a legendary item that is essentially free for those who put time into the game. It sucks for alts that don't have one, but it allows pretty much anyone who wants one to have it on their main.