Darkness surrounds your hand, turning it into a deadly weapon.

Umbral touch infuses one of your hands with dark, shadowy energy, allowing you to make debilitating melee touch attacks. A successful strike deals 5d6 points of damage to a target, which must succeed on a Fortitude saving throw or also be slowed. While this mystery is active, you threaten an area as if you were armed and can make attacks of opportunity with your umbral touch.

This mystery completely occupies one of your hands, as if you were holding an object in that hand. If you have another open hand, you can cast other mysteries or spells normally, even those with a range of touch, but you cannot deliver another touch mystery or touch spell and make an attack with umbral touch in the same round.

This effect lasts for 1 minute per level, but each successful touch attack shortens the duration by 1 minute (allowing you to make one successful attack per level before the effect is discharged).