Arcane Puzzlebox

A 4-inch box that displays complex runes that
change each dawn. The box cannot be destroyed
by normal means. After 3 hours of uninterrupted concentration, roll 3 consecutive intelligence
checks. On a fail, the box locks up until the next
dawn. The last person to successfully open the
puzzle box can access it with a touch of their
hand. At the same time, they also receive a mental
alarm when the puzzle is attempted. Each box
can only hold one item no larger than 5 feet.