Made Wit's End passives unique and made the buffs more consistent.
Minor comment change
Modified UniqueEffectType.create to instantiate the relevant object directly.

Added Majai's and Occult UniqueEffectType entry.
Added priority to MainPassive
Updated ButcherPassive to support all items that use it.
Added multiple new items including Mejai's Soulstealer and Sword of the Occult.