Persistent Vigor

Transmutation
Level: Alchemist* 4, Artificer * 4, Cleric */Oracle * 4, Inquisitor * 4, Shaman * 4, Warlock * 4
Components: V, S, M/DF (ginseng root shavings)
Casting Time: 1 Standard Action
Range: personal
Target: you
Duration: 1 round/level (D)
Saving Throw: -
Spell Resistance: -
  You are filled with a persistent vigor. You gain Fast Healing 2 and are immune to bleed effects as well as the Sickened and Nauseated conditions. When you succeed at a saving throw against a disease or poison effect, that disease or poison effect ends (as if you had succeeded at enough saving throws to cure that effect).
  If you fail a saving throw against a disease or poison effect, you can instantly dismiss this spell to reroll that saving throw with a +4 bonus; you must take the result of this reroll, even if it is lower.