To get the Ragnarok with 109 attack power, you must pass the Pharos at Ridorana. After you pass the Pharos, go to the clan hall and talk to Montblance. He will give you a special hunt to kill Ixion. Once accepted, go back to the Pharos at Ridorana. You must be at least level 66. Purchase a Golden Axe for 18,000 Gil and some Echo Herbs and Eye Drops. Equip the Golden Axe to your strongest character. It will take a ranged damage of 1 to 9,999. Make sure you have three Bubble Belts to double your maximum HP. To find him, go to the lift just when you get in and take it up to Penumbra. It will require a few attempts to find and kill him. Once you do, go back to the petitioner and he will give you the Ragnorok.