Blood Sacrafice

The caster's body destroys its self; make a Constitution Saving Through. 10 and bellow reduces the caster to -2 hit points, 11 - 20 reduces the caster to 0 hit points; if the caster is at half health or bellow, the spell knocks the caster to -5 hit points. The damage dealt depends on the health the caster has before casting this spell. For every 3 hit points (always round down) the caster has, roll 1d4. The caster can target 1 enemy to deal all damage to, or the caster can choose to release it in a pulse doing equal about of damage to every creature in a 25ft range.