Touch of the Grave (Su)
Source: Advanced Class Guide, p. 39
As a standard action, the shaman can make a melee touch attack infused with negative energy that deals an amount of damage equal to 1d4 points + 1 point for every 2 shaman levels she possesses. She can instead touch an undead creature to heal it of the same amount of damage. A shaman can use this ability a number of times per day equal to 3 + her Charisma modifier. At 11th level, any weapon that the shaman wields is treated as an unholy weapon.
Greater Spirit Ability: A shaman who chooses the bones spirit as her spirit or wandering spirit gains the following ability upon having access to the greater version of that spirit.