Golden Hammer 50%

How do these work? Like if I fail one, will I lose a slot or can I just keep using hammers until two pass?

If it works it works.

If it fails count hammer count goes up, slots don't change. You have to either inno (and pass 2 hammers) or pass a clean slate to get the slot back.

Do Lucky Day Scrolls affect hammer success rate? Or Diligence?

Do Lucky Day Scrolls affect hammer success rate? Or Diligence?

They are not scrolls so nope.

Inno-ing will take away the hammer slot, so please be wary.