On 3F you'll find a Rune Device in the southwest corner.
- Using a Lv. 4 weapon, you can pry the device open, obtaining a Red Key.
On 4F you'll find a second Rune Device in the northeast corner
- The device is visible from outside the wall.
- The mechanism can be opened by solving a puzzle, similar to mastermind if you've ever played it.
- The machine will guess 3 numbers between 1 and 9 (none repeating), and you will be required to crack the password.
- Each round you can guess 3 numbers from 1-9 (no repeats) and the machine will inform you how many of the numbers you chose were correct and in the proper location, and how many numbers are correct but not in the right location.
- You have 5 rounds to guess the correct code or you will be required to restart. When you correctly complete this puzzle, you will obtain a Yellow Key.
On 5F in the top left corner, click the Eagle Statue. Insert the Red Key into the crack, followed by the Yellow Key. You will receive a Blue Key.
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On 6F in the very northeast corner, there will be a Gorgeous Statue. The dialog lets you adjust 5 wheels. You will want to adjust them so that they are all in the same configuration, one solution is:
- 1st Small Wheel -> Raise Wheel (1st option)
- 2nd Small wheel -> Lower Wheel (2nd option)
- 1st Big Wheel -> Vertically Shift Wheel (3rd option)
- 2nd Big Wheel -> Raise Wheel
- 3rd Big Wheel -> Raise Wheel
Also on 6F walk south and you will find the last mechanism inside a fireplace. Choose the 2nd option each time to obtain the Black Key.
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Once you've obtained all 5 colored keys enter the portal at the center to go to the next floor. The Black Key will transform itself into the Black Charm Stone. You cannot enter the portal unless you have all five Keys.
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On 8F you will find a set of Shining Crystals. Talk to it, and one of your keys will transform into the corresponding charm stone.
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On the 12th floor, start by placing the Charm Stone.
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The pathway to the top of the tower should now appear in the center of the floor.
At each platform, you have to step at near the center to activate the input box. Be sure to have the correct fragments in your inventory
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After the four fragments are inserted and monsters are defeated. You will be summoned to the north platform and after a short speech, Memory of Thanatos will spawn directly next to them.
- There will be a 2 hour cooldown before he can be summoned again by anyone.