Crest of the Rat

 is an item in Dark Souls.

==Availability== 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; Alternatively, after defeating the  Royal Rat Authority in  Ordeal's End, the Rat King will appear beyond the arena. Talking to him with a  Rat Tail in one's possession will allow the player to join the covenant.

==General Information== Equip , while in   Grave of Saints. This will summon gray phantoms into your world. Kill them and recive  a  Rat Tail and  Pharros' Lockstone.