1.it shouldn't be locked behind a raid2. it's not a big deal
Even ignoring the obvious issue of needing someone to tank for you in order for you to tank can we also talk about the consistent alliance favoritism for these runes? Between this and the bought ones horde have to go to redridge and loch modan which are both deep into alliance territory. Meanwhile alliance have to go where? SFK? It's not even that far away from southshore.....
Why are so many runes in the game geared towards Alliance players? Horde players have to travel to Redridge for several runes or rune pieces, Duskwood, and Darkshore, is there just no horde equivalent found yet or are the Horde players seriously being forced to travel into extremely difficult to reach places in order to grab their runes? I don't understand how the dev's failed to remedy this.. And this rune being stuck behind all of the above and a raid clear is just nuts. Maybe this will make warlocks the top tier tank though?
Metamorphosis is garbage. 500% armor of not a lot is not enough armor. There's zero damage reduction, no dodge (outside of the other rune which is garbage), and no stamina buff. The threat is also really bad. Getting the rune just requires a single lockout if you spend a few gold for a spot in an already-saved BFD that is 5/7 bosses. The acolytes you need respawn inside every 2 hours. There were 4+ acolytes.