Dark Matter Sword (Equivalent Exchange)

An unbreakable weapon of death-dealing made of Dark Matter, the Dark Matter sword has a base damage of 6 hearts. It has two special effects that can be activated when charged:
1) When charged, each level of power will deal an additional 2 hearts damage to an enemy on top of the initial base damage of the weapon, to a maximum of 20 hearts damage (7th Level Charge is as high as it will go). Typical foes require only a level 2 charge or occasionally even less to kill, but some stronger mobs may take more "persuasion".
2) If not used directly against a mob, the alchemist may use right-click or the R key to use a powerful area-of-effect slash, decimating any living (or undead) creatures in the vicinity by a slightly less devastating attack (but still substantially more powerful than a normal swing). The area of effect and the diminished damage bonus are also determined by charge level.
Regardless of what method you employ, each charge level consumes 1 glowstone dust. Killing things is expensive!