Ravencraft is a pirate harbor where live the Raven Squad. You can conquer this town for you, and to become leader of the Raven Squad, so you can invite your friends or kick old members. But for this you must do a mission, you have to prove that be able to join the pirates, killing his guardian. It is of utmost importance to emphasize that this mission can only be done once a day and guild leader must be online.
Conquering the castle: First go to the island of teleports, south of the island you will find the room of the conquests. Note that to conquer Ravencraft have requirement of level 140. Move the switch, then you summon the guardian Pirate Elder, now go to Ravencraft, in center of city have a tower, the guardian spawn is on top of this tower, kill him, when you kill the guardian appear a yellow gem, get it and go to royal boat (leaving the tower, go west and north, go down the stairs to the east, go around the entire pier to the east, then there are the royal boat), go to the prow's rooftop, put the gem on pedestal (marked in the image in pink) and pull the switch. The guild should be yours.
Inviting players: In the prow's rooftop of royal boat, the player must step on the stone tile marked in the image in yellow and the leader moves the switch.