Bigger Knife

Starts as a standard dagger, once per long rest
you can say the activating words,
"That’s not a knife, thats a knife"
while drawing it and it will immediately become
a nonmagical X+1 dagger where X is the biggest
'plus' amongst all daggers in the party,
it resets to normal after a long rest.
If anyone has a +3 dagger it instead turns into a
spoon.