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Light would be slightly distorted at this crevice, but the effect was more subtle than dust, nearly invisible without close inspection.
"Seventeen hundred years have passed, finally revealing a sliver of a gap in this seal. Without destiny's guidance to narrow the search, it would have been impossible to find. Impressive, Arthur Laine! Truly worthy of the legend who slew the Magic Dragon."
Amberser tried to sense it with magic, but to little avail.
This was merely a crevice formed by the seal's damage, not a method left for later generations to unravel.
The original Arthur Laine hadn't intended for it to be found; hence, the seal was like a lock designed without a key from the beginning, devoid of a conventional method to unseal it.
Amberser could resort to brute force to dismantle it.
Holy Light and Dark Magic Power were incompatible, like water and fire; using Dark Magic to corrode the seal would undoubtedly weaken its power, thus breaking it open.