Polarities Mod/Last Blood

Last Blood is a Hardmode book that is purchased from the for  after the  is defeated. When used, it grants the player a teleport when standing on the ground; pressing the hotkey (I by default) will instantly warp them to the cursor's position with a burst of blood at both points. However, it cannot be used when in midair for any reason and afflicts five seconds of Chaos State, making it fairly situational to use.

Trivia

 * Its title references the 1972 thriller novel First Blood.