Nothing makes your blood run cold quite like hearing that guttural, demonic voice shouting Fresh MEAT! It can't get much worse than that, right? Wrong — as some players have found out, The Butcher can spawn in the worst possible scenarios — along with the Dungeon Boss! The Butcher Spawning With Bosses on RedditImage courtesy of Waebi on Reddit. This issue seems to trigger most often in dungeons such as Sarat's Lair, where the zone that the boss spawns is part of the normal dungeon until the criteria have been met and not a separate boss arena.
Read more on wowhead.com