When are mythic+ dungeons released and how does one obtain the keystone for it? Also is it true when they say that it will be an alternative to raiding? Does that mean that it can drop the same ilvl gear with different difficulties of raids? Can it truly be an alternative to raiding in that one can obtain a high ilvl solely from mythic dungeons, allowing them to obtain gear and ilvl to play even at mythic raiding difficulty?