Dark Magus

As a Dark Magus, you have decided to focus on manipulating your Well of Darkness. Doing so allows you to convert your own life force into powerful Dark Arts.
You know two Dark Arts at 3rd level, detailed in the Dark Arts section below. You learn one additional Dark Art of your choice at the 6th, 11th and 17th level. Additionally you know the Toll the Dead cantrip. Also, your maximum number of Well of Darkness points is increased by a number equal to your Charisma modifier.
  Casting Dark Arts. Using the dark magical energy from within, you are able to cast spells. See chapter 10 for the general rules of spell casting. To cast one of these spells you use its casting time and other rules, but you don't need to provide material components for it.
Once you reach the 6th level in this class, you can spend additional Well of Darkness point to increase the level of a Dark Art that you cast, provided that the spell has an enhanced effect at a higher level. The spell’s level increases by 1 for each additional Well of Darkness hit die you spend. The default casting level of these spells is at the lowest possible level.
  The maximum number of Well of Darkness point you can spend in this way (including the base cost and the additional points you spend to increase the level) is determined by your Dark Knight level, as shown in the Spells and Well of Darkness Points table.
 

Spells and Well of Darkness Points

 

Dark Knight Levels	Maximum Points for a Spell
6th-8th	4
9th-12th	5
13th-16th	6
17th-20th	7

 

Dark Arts

The Dark Arts list is presented in alphabetical order. If the magic requires a level, you must be that level in this class to learn the spell.
  Abyssal Drain. (17th Level) You can spend 6 Well of Darkness points to cast Contagion.
  Creeping Darkness. You can spend 2 Well of Darkness points to cast Darkness.
  Damning Curse. You can spend 1 Well of Darkness points to cast Bane.
  Dark Dance. You can spend 2 Well of Darkness points to cast Mirror Image.
  Dark Passenger. (11th Level) You can spend 3 Well of Darkness points to cast Lightning Bolt. The spell deals necrotic damage.
  Delirium. You can spend 2 Well of Darkness points to cast Suggestion.
  Edge of Shadow. You can spend 2 Well of Darkness points to cast Shatter.
  Flood of Darkness. (17th Level) You can spend 6 Well of Darkness points to cast Negative Energy Flood.
  Helter Skelter. (11th Level) You can spend 4 Well of Darkness points to cast Hypnotic Pattern.
  Power Slash. (6th Level) You can spend 3 Well of Darkness points to cast Elemental Weapon.
  Reprisal. You can spend 2 Well of Darkness points to cast Hellish Rebuke.
  Salted Earth. (6th Level) You can spend 3 Well of Darkness points to cast Hunger of Hadar.
  Scourge. You can spend 1 Well of Darkness points to cast Hex.
  Shadow Skin. (11th Level) You can spend 4 Well of Darkness points to cast Shadow of Moil.
  Shadow Wall. (17th Level) You can spend 6 Well of Darkness points to cast Wall of Force.
  Syphon Touch. (6th Level) You can spend 3 Well of Darkness points to cast Vampiric Touch.
  Unleash. You can spend 1 Well of Darkness points to cast Arms of Hadar.
  Unmend. You can spend 1 Well of Darkness points to cast Magic Missile.