Ainz - Red vs. Blue Potion

“Potions made entirely with magic use an alchemical solution. Those are made by using alchemy on minerals, so it stands to reason that they would degrade over time! That’s why we have to cast Preservation!” She paused for a beat for effect. “Or rather, ‘had to’!”

Brita vaguely understood what Lizzy was saying and eyed the red liquid in surprise.

“This! This potion—this potion! It won’t degrade! In other words, it’s a perfect potion! No one has ever been able to produce one! According to legend, a true healing potion signifies blood of the gods. This story has been told for ages!” The potion shook in her hand and the crimson liquid sloshed. “Of course, it’s only a legend, and apothecaries even joke with one another that the gods themselves must have blue blood, but...” She paused for a moment to stare at the bottle clasped tightly in her trembling hands. “This potion must be true Gods’ Blood!”

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Volume 2, Chapter 1.3