Rat King (covenant)

The Rat King Covenant is a Covenant in Dark Souls II.

Joining
Defeat the boss Royal Rat Vanguard located in the Grave of Saints, in the deep pit in Majula. Directly after the boss room, there will be a rat called the Rat King. Talk to him with a Rat Tail in your possession and he'll ask to join the covenant.

Benefits
Upon joining, you'll gain the Rat Crest ring. Your job is to defend the territory of the Rat King. This is done in an unusual way, however. Enemies in the area become non hostile towards you, so you use this to your advantage. While in the Grave of Saints, human form, and wearing the Rat Crest, you'll summon other players who are in the Grave to your world as a grey spirit. Their task is to kill you. You have to kill them, with the help of the local enemies. Upon defeat of a grey spirit, you'll receive a Rat Tail.