An example would be an accessory which increases your attack power by 50 % in exchange for taking away your ability to block. (namakoteam.com)
But they have come under increasing attack in recent years. (lindau-nobel.org)
Using materials gained in combat you can create «badges» which increase your attack power, give you longer combos, boost your defense against certain weapons and even unlock new skills. (nintendolife.com)