The 
NETHER (kanji 冥) attribute is also referred to as Dark in in-game files. It is a regular attribute (which consists of Fire, Water, Wood, Aether, and Nether attributes), which means it has its own reserved spot in the outgoing Support Lineup like other regular attributes.Nether cards have modified damage multipliers when facing other cards of specific attributes. These multipliers are listed in the table below.
| Ally attribute | Enemy attribute | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| NETHER
|
 ALL-ROUND
|
 FIRE
|
 WATER
|
 WOOD
|
 AETHER
|
NETHER
|
 INFERNAL
|
 VALIANT
|
 WORLD
|
| Attacking | 1 | 1 | 1 | 1 | 2 | 1 | 1.5 | 0.5 | 1 |
| Defending | 1 | 1 | 1 | 1 | 2 | 1 | 1.5 | 1 | 0.5 |
Nether boosts and limit break materials are obtainable in Daily Quests on Fridays JST and in certain free quests.
Card Attribute
Limit breaking a card requires power stones and spell tokens that match the attribute, and leveling is optimal when the boosts also match the attribute. A full list of cards with Nether for their attribute can be found here.
AR Card Limitation
AR Equipment can only be equipped on cards that match its limitation criteria. Currently, only Shard of the Abyssal Gatekeeper has a Nether attribute limitation.