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"Huh? Are you sure these were Rank 9? They were too weak." Miranda said in surprise. "I remember that Aquarius Trial was harder than this. The bosses were Rank 9 in the beginning, no?"
"Looks like the ones here are much weaker, or we've simply grown stronger, Miranda." Benladann smiled. "I've already reached almost the Middle Stage of Rank 9 myself, so my Rank is shared with yours… Then again, Chaos Magic is specially deadly against almost anything, and these monsters were small fries. I bet there must be something more to it… I hope, or this will be disappointing."
Of course, it wasn't just brute magic power completely, as Miranda had also put a few thousand points of Divine Power into her blast, and she was also wearing many accessories, clothes, and a black wand that boosted her magic spell power even further, all courtesy of Drake's crafting.
Check "The Protagnist's Sister Is Actually the Strongest"!