Su Yue'er's master runs Taiyue Sect and is genuinely formidable, though he's operating well below his full potential. A serious injury from the immortal-demon war left him permanently weakened—he's stuck at the upper echelon of the Enlightenment Realm and hasn't managed to recover beyond that point. There's a mysterious seal etched into his forehead that hints at some connection to the demon race, though the exact nature of that link remains unclear.
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