[MattB]

I have 2 shovels, both 1d2 +0,+0 6lb
One of them is standard and clears granite in 100 turns.
The other one is cursed (airswing) and has the ??? tag. It clears granite in 29 turns.
I have tunnelled with both... am I missing something here?

EDIT: I now know all about it. The ??? was for treacherous weapon curse. But it still clears granite three times faster than a standard shovel, for some reason...