Ley
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ley I'm 100% sure, but I've had it happen many times that at the beginning of a new week, the location of the monsters changed, and those that used to run away started appearing, and then I took monsters like him, and he joined.
I don't believe that. And what does "at the beginning of a new week, the location of the monsters changed" mean? Maybe this monster was attacking you first?
"Единственное, что можно сказать с уверенностью об удаче - она изменит..."