Have you heard the rumor about the pond where a deity appears?

Quest Text I heard there's a strange
rumor going around at the institute.

Summary The rumor about the pond?
I've heard about the rumor, and it seems to be true.
A painter dropped their brush into the pond,
and found a brush not entirely new but still pretty new in front of the pond.
And even today, I saw many people throw some objects into the pond.
I was also curious so I threw in an old booze bottle.
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