Poltergeist

The Poltergeist is a creature from the Witchery mod. They appear occasionally when a Summon Banshee or Summon Spectre conjuration is performed with a Brazier. They are invisible and tend to cause mischief. They will open doors, throw objects, opening chests, and attacking players.

They will deal about 1 heart, or 2 health points of damage per attack. Poltergeists attack rapidly, and as such can deal a fair amount of damage very quickly. A Brew of Revealing will show the player what they actually appear as, rather than smoke. Poltergeists have 20 health, or 10 hearts of health points, and drop nothing when killed.

Using Graveyard Dust on a player-controlled Poltergeist will boost its max health by 2 points, or 1 heart. It can be up to 50 maximum health.