The Black Dragon Princess is immensely powerful. Although she doesn't match the Black Dragon Queen at her peak, she's still among the top tier world-class leaders, almost on par with the faction Chieftain.
Moreover, it's not easy to kill her in her lair, where the numbers of Black Draconids and Black Dragons are significant, at least for the players.
This challenge alone is daunting, let alone quenching the fire and keeping your blood boiling, which speaks to the difficulty level.
Even after becoming a dungeon, the difficulty has slightly reduced, but with reduced difficulty, the weapons acquired don't achieve their best state.
Weapon attributes have boundaries; at worst, they're golden legendary, and at best, they're comparable to divine artifact attributes and effects. Based on task completion complexity and luck, effects will randomly generate three to four.