"Bigger" Knife

A large dagger that provides +1 to hit and +1 to intimidation when held.
When attuned, use a bonus action for "Bigger"
Knife to grow only slightly larger than anyone
else's dagger in the room.
During a failed intimidation check, the "Bigger"
Knife will turn into a flaccid spoon until dawn.
"Check yourself before you wreck yourself."