This item has the appearance of a puzzle-box with a toy weapon's handle sticking out.
Any attempt to force the weapon from the box by destruction, feat of strength, or magic (shot of wish) proves fruitless.
Only by successfully completing the puzzle does the weapon free itself and become a full sized weapon bound to the solver.
Any attempt to pick up or use the weapon by anyone who has not solved the puzzle will result in whatever their trying to pick up the weapon with phasing through the weapon.
If lost the last solver of the puzzle can focus on the cube for one hour to return it to the puzzle, thus resetting the puzzle.
The weapon can only be transferred by reinserting the weapon back into the cube which resets itself upon this condition.
Resetting the puzzle resets all the attempt rules for the item.

The puzzles difficulty and amount of time in between puzzle attempts depends on the rarity of the item within.

Common | once an hour with a Wisdom DC 5
Uncommon | once a day with a Wisdom DC 10
Rare | once a week with a Wisdom DC 15
Very Rare | once a month with a Wisdom DC 20
Legendary | once an year with a Wisdom DC 25
Artifact | once with a Wisdom DC 30 and a special location and or item may be required to attempt.