Envenomate (Ex)

Prerequisite: Constitution 14 and a natural method of injecting poison (e.h. a stinger or fangs).
Use: 1 + Constitution modifier per day
Action: Attack action, tied to natural attack that can deliver the poison.
Target: Single
Duration: Instantaneous
Saving Throw: Fortitude, Fortitude after 1 minute.
DC: Constitution Based
Spell Resistance: No

The user's natural attack gains a chance to envenomate its target. The subject must make a Fortitude save, DC (10 + 1/2 HD + the user's Constitution modifier), or take 1d6 attribute damage. After 1 hour, the subject must repeat the save or take another 1d6 attribute damage. When taking Envenomate, the user must choose which attributes are affected. The first and second instances of damage can affect the same attribute or different ones.