A Warrior is a combat faction of humans. Like Vampires or Werewolves, the Warrions have right to fight with other PvP players.
At the start, a player is normal peaceful human, and cannot fight.
To become a Warrior, a human player has to kill a sacrificial sheep with a [[Knife of Caine]]. The initiation is instant.
To return to peaceful life, a Warrior needs to burn a Knife of Caine in a furnace, on a bucket of lava.