Unlock Seraphic Gate
When you complete the game 3 times and have viewed ALL 3 endings the Seraphic Gate will become an available option at the 'Configurations' menu. The Seraphic Gate is a dungeon that has 19 total stages (10 battle stages with nine sub-stages). When you clear the Seraphic Gate 10 times you will obtain the Angel Slayer sword which has 7800 ATK.
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