In Atlantica, the Abyss of Taj Mahal is similar to the set up of a Shadow Dungeon yet it isn't really one. The point of it is to obtain your level 50 main character only ring.

The problem is that you need 30 multi hued crystal shards, which can set you back 4 million Atlantica Gold. Its good, but probably too expensive for most players at this level(atlantica gold) unless you have been winning PvP consistently for a while. The mobs here aren't as great as Bran Castle either but if you're doing the quest in a party, at least you'll conserve a bit of stamina and get the level 50 main character ring. The mobs here are fairly easy. If you do the quests, here you also need to make 10 friends.

Here at level(Atlantica Gold) 50 the boss is similar to the Anubis type enemies you will encounter later on. She uses a powerful lightning attack that acts similarly to what archers do. She is also the first boss immune to freeze and stun. Its important to focus on clearing the mobs before actually fighting the boss.