Core Overcharge

As a last resort, the Warforged overcharges his own core, allowing him to cast known spells of a level he can cast.

• This effect lasts for one Minute and can be activated once every long/full rest.
  
  
• The spells do not consume spellslots, yet consume the casters own lifeforce.
  
  
• The spell must either deal damage or heal a friendly creature.
  
  
• After casting, the caster recieves damage equal to the potential damage or healing done, even when the attack does not hit.
  
  
• Damage received this way may not be healed until the ability is available again.
  
  
• After the effect runs out, the user gains one level of exhaustion