This Is How Vampires Fight

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Blood rained over dozens of demons as I felt the EXP flowing towards me, I accumulated it through the Grimoire's Ability to accumulate EXP, which granted bonus EXP the more it was accumulated. It was a power I've been using for a while, something often referred as [EXP Combo] or whatever. The more EXP accumulated I had before receiving it, the larger the bonus would be. Perhaps this is also a way to compensate for my slow progress, although it feels like a glitch more than anything fair. But well, knowing the damned Lucifer, would he ever do something fair?