"You won't need them," Leo said with a reassuring smile. "I promise."
"With the one hundred crystals you have, it will be more than enough if we overcharge them. That fifty-day buffer in the standard method? It's to compensate for the low mana concentration in the night crystals. The beetle takes fifty days longer because it's adapting to a deficiency."
Leo’s smile widened. "I know why they don't use larger crystals—mana poisoning is a
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