The Abyss of Demons Key open Abyss of Demons dungeon.
The Abyss of Demons is a medium-level dungeon that is a staple source of Potions of Vitality and the Demon Blade for many players.
The normal enemies in the dungeon attack in groups, have low health, inflict no status effects, but deal high damage. In addition, much of the dungeon is covered with lava, meaning high defense and/or HP is recommended for surviving the dungeon.
Entrances to the Abyss of Demons are commonly dropped from White Demons and last 30 seconds.