章節 402: [Bonus chapter]New Abilities Part 2

Just like Mira thought, she only had enough of the hellish aura to last another two hits before she ran out. 

She also discovered that controlling the hellish aura is nearly impossible. Mira thought she'd be able to separate the aura's effects, but it seemed she was too naive. From what she could tell, things aren't as simple as increased sharpness, destructive power, and mind attacks. It's more like the aura is hellish not because of these effects, but the cause of these effects is the aura itself.

To put it in simpler terms, if she were to try and control the hellish aura to only focus on a single aspect, it would no longer be 'hellish'. Therefore, she would also lose out on the benefits gained from the aura.