Abysses are interactable objects in instances which spawns cracks and pits that spawn monsters. They can spawn from Act 6 onwards.
Upon walking over an Abyss, a crack will form on the ground, and a small number of monsters will spawn out of it. The crack will expand as you follow it. The crack will eventually spawn a pit, which spawns many more monsters, including rare monsters. If the player takes too long to follow the crack into a pit or kill most of the enemies that spawn from the pit, it will close up. Otherwise, it will create another crack that leads to a different pit. An Abyss will normally create three or four pits, but since the cracks can't cross themselves or each other, the Abyss may end prematurely if it works itself into a corner.
Clearing the enemies out of the last pit will spawn an Abyssal Trove, which can be opened for loot. In addition to generic loot, an Abyssal Trove will always contain at least one Abyss jewel, possibly more.
In zone levels 70 and up, instead of an Abyssal Trove, it may open an entrance to the Abyssal Depths instead.
- Abyss Jewels
Abyss jewels have the same functions as regular jewels, but with some differences. They offer different types of bonuses from regular jewels and most mods have tiers that depend on item level. They can be socketed in the jewel slot of the passive skill tree, but also in items with an abyss socket, such as a Stygian ViseStygian ViseHas 1 Abyssal Socket and unique Abyss items.
- Stygian Vise
- Abyssal Depths
Abyssal Depths is a side zone that can spawn in Abysses in zone levels 70 and up. It contain Abyss monsters. The boss in this area is either a Stygian Spire or an Abyssal Lich, the latter which drops unique items.