The protector of day Atl (Water) and the provider of the Shadow Soul or Tonalli is Xiuhtecuhtli, Lord of the Year, the old god of fire. Atl is a day for purification by subjecting oneself to the ordeal of conflict. It is a good day for battle, a bad day for rest. Water brings out the scorpion, who must sting its enemies or else sting itself. Atl is the day of the holy war, which is always a battle with one's own enemies within.