[Event] Someone's Box

A box bearing traces of use. It appears difficult to determine its owner.
Press Secondary Attack to obtain several of the following according to a set probability:
Advice of Valks (+60)
Advice of Valks (+50)
Advice of Valks (+40)
Memory Fragment x1-2
Sharp Black Crystal Shard x1-2
Cron Stone x2-3
Caphras Stone x1-2
Black Gem Fragment x3-4
Black Stone x3-4