Weapon Groups are groups of similar weapons or items with similar abilities. All weapons within a group have at least one ability in common. Weapons in the same group usually look the same (With exceptions). Different kinds of weapons in the same group usually have the same names across weapon types (With exceptions). Each weapon type within a group has several different models each getting a higher attack power, rarity, abilities and skill bonuses than the previous version. Each higher version may have a higher boost or gain a new ability or skill boost, but it may not lose an ability. If a weapon has a boost to a Combo skill, a higher version of the weapon may have a boost to a more powerful combo skill (ex: if Weapon A has a boost to Cleave, a higher version of it may have a boost to Fl