## Arcane Toughness You draw upon the power of your magic to sustain yourself, allowing you to continue fighting long after your physical body has failed you. **Prerequisite:** [[Toughness]], arcane caster level 3rd **Benefit:** When you are reduced to 0 or fewer hit points, you can expend a prepared spell or spell slot to heal 1d6 hit points per level of the spell or spell slot used in this manner. You can do this as a free action whenever you are taken to 0 or fewer hit points, and once per round each round you start your turn at 0 or fewer hit points.