Once you have the Fire Staff you must now head to Argartha. Once here you will to kill zombies on the metal grate near 4 Cauldrons. Once they are set a light you have completed this step.

Next you will need to go back to Origins and light torches underneath the church with the code you get in the top floor of the church. This code can be got by identifying the light balls on the wall to a number in binary code. For a guide on the possible numbers click here = [ Register or Signin to view external links. ] . Once you have your 3 digit code you must light the torches in this order and then finally light the torch with the zombie blood underneath it as this is the enter key. You have now completed this step

Once you are this far the next step is to head to the floor under the Pack a Punch machine, where you will find the 4 Elemental statues and crafting areas for each. Next you will need to match up all the Red Gems on the 4 floating rings using the 4 different switches. Once they are all in line continue under this rings and you will see a Red Sphere, Light it with your Fire staff.

Next head back to Argartha and place the Fire staff in the Fire Gem Pit, Next kill zombies near this pit to fill the staff with the zombies souls. When it is full you can remove it and you now have the Ultimate Fire Staff or Kagutsuchi's Blood.

Once upgraded to Kagutsuchi's Blood, it shoots Fire balls with much more power and damage than its previous version. You can also hold down the firing button in order to charge it up, at the cost of more ammo per charged shot. When charged and released, it fires a blast of Fire, and continues to burn almost like a volcanic eruption killing nearby zombies. It also gains a secondary "attachment" called Sekhmet's Vigor which when activated by pressing right on the D-Pad, will cause the player to flip the staff and use the bottom end. This can be used to revive a downed player by "shooting" him."