Haunted Axe

It is sort of the same as an axe but has a special ability. The axe has different versions of itself. There is the Soul, Curse, Haunt, and Fear Haunted Axes. (The Haunted Axe, and its different versions can be found in mine shafts)

Soul: When another player or mob dies by this, they will turn into a spirit. The player can then catch them with a Soul Catcher and well do whatever they want with their soul. (And no, the spirits won't fight other mobs for you)

Curse: When a player or mob gets hit, there is a random chance they will get the curse effect. The curse effect will make them only be able to walk in a certain area, if they walk out the area, they will slowly start taking damage.

Haunt: When a player or mob gets hit by this, there is a random chance an evil spirit will be summoned. The evil spirit will go towards the nearest hostile mob and possess them. After possessing them, they will go to the person who got hit by the axe and well, you know, attack them.

Fear: When a player gets hit, all hostile and passive mobs will have a more frightening look. If the person who got hit looks at the.... "Fear" versions of the mobs, the mobs will automatically attack that person. Also, it inflicts a blind effect on the player as well. (I could not really think of a more unique idea for fear)