Great addition for any mod that adds Luck effect in any way.
Improvements:
-Increase ore drops and even adds a slight chance (depending on level) to add special drop like: diamonds to coal ore, raw gold to iron and copper ore ect.
-Give you an ability to dodge an attack (depending on your AND enemy luck).
-Increase mob drop, also adding few special drops.
-Increase ore experience.
-Equipment has a slight chance to not be damaged.
There is special gamerule called "Lucky Morning", adding a slight chance (4%, can be changed) to wake up with luck or unluck effect.
Destroying grass and fern can drop special item called "four-leaf clover", that can be brewed into Luck potion or adding Fermented spider eye into Unluck potion.