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Prince An's proposal sounded extremely reasonable, even to Emperor Longchang, who was forced to watch from the sidelines. However, the emperor's heart was bleeding. The "Ancestor Panpan's Protection" was indeed a life-saving artifact on the battlefield, but it required immortal spirit energy to activate. The stored energy was only enough for one activation, lasting a day.
Once the energy was depleted, one would have to shamelessly beg the Immortal Dynasty for a recharge, leaving the artifact there until the immortals had the time to deal with it. Having experienced this humiliation a few times, the emperor had sealed away Panpan's Protection.
But this decision led to the downfall of the Great Qian's hope, Commandery Prince Hao, on the outer region battlefield. Therefore, when Prince An prepared to set out for the Southern Border, the emperor had equipped him with the protection decades ago, not expecting to wait so long.