Isle of Nightmares

Isle of Nightmares is typically cleared only for the creation of Hephaestus Tokens. It's recommended to run the dungeon Hard Mode, so that the Entaness' Sigil has a chance to drop in addition to weapons.

There are no minibosses in this dungeon, and the route is very straightforward. You turn to the left (there's a dead end to the right) and run clockwise around the dungeon until you reach the boss teleporter. The boss may spawn minions, but they're easy to deal with.