The Realm First achievement for Mythic dungeons was first introduced in Battle for Azeroth and requires finishing a (+15) Mythic Keystone dungeon before the timer ran out. Though timing a “Fifteen” is no easy effort for the typical World of Warcraft player, it was a simple goal for the majority of the game’s elite players. Timing a “Twenty” may occur much sooner than the World First raid clear, but it will make the race thrilling in a way not seen before.
The pool of dungeons included in Dragonflight’s first season will adhere to the formula established in Shadowlands Season 4. Only four of the expansion’s eight new dungeons will be Mythic Keystone dungeons, with the remaining four spaces filled by updated dungeons from Mists of Pandaria, Warlords of Draenor, and Legion. Poorly calibrated returning dungeons, which might derail the Mythic Keystone race, is one thing that players are trying to avoid in Dragonflight Season 1. Given that the creators designed the season from the start to include legacy material, this should be avoided.
