Hello.
I want to tell about some mistake, which i found.
Bosses in Upper Blackrock Spire (UBRS) Pyroguard Emberseer, Warchief Rend Blackhand, The Beast and General Drakkisath should have classification Boss, with skull. But now in wow classic they are simply elite mobs with visible level, like in Cataclysm, when this instance became for 5 ppl.
For example, from wowpedia:
htt ps://wow.gamepedia.com/General_Drakkisath
Patch 3.3.0 (2009-12-08): Changed from a level ?? boss to a level 62 elite.
htt ps://wow.gamepedia.com/The_Beast
Patch 4.0.3a (2010-11-23): No longer a level ?? boss
And on this video from 2006 we can see, that bosses have skull instead of level.
htt ps://www.youtube.com/watch?v=kCgbK-TCcVo
This also applies to the black dragon in Blasted Lands - Teremus the Devourer.
On this video from 2007 he still have skull instead of level.
htt ps://www.youtube.com/watch?v=R6Rv9Xz_J48
And about the bosses:
htt ps://wow.gamepedia.com/Boss
Skull bosses
Skull type bosses are the hardest mobs to kill in WoW. Their level is not displayed as a number, but as a death’s head sign. When hovering your mouse over such a mob, the tooltip will read “Level ?? (Boss)”.
These bosses have a “dynamic” level - when a numeric level is required for some calculation, they are considered to be 3 levels above the player character involved in that calculation. That is, if both a level 60 warrior and a level 65 druid both tank the same skull type boss, the boss will make crushing blows on the warrior as if it was 63, and on the druid as if it was 68. Similarly, the boss will resist their respective powers as a 63- and 68-level creature would. The first skull type boss that a player may fight with in PvE used to be Pyroguard Emberseer in Upper Blackrock Spire, but as of Patch 3.3.0 this mob is now an ordinary level 60 Elite; The Beast in the same dungeon is still a skull boss, however. There are also some skull type bosses that a usual player can not fight with, e. g. Nessy in the Deeprun Tram.