Poison (Ex)
Source: Advanced Player's Guide, p. 62
An eidolon secretes toxic venom, gaining a poison attack. Pick one bite or sting attack. Whenever the selected attack hits, the target is poisoned. Eidolon poison—type poison (injury); save Fort negates; frequency 1/round for 4 rounds; effect 1d4 Str damage; cure 1 save. The save DC is equal to 10 + 1/2 the eidolon’s HD + the eidolon’s Constitution modifier. For 2 additional evolution points, this poison deals Constitution damage instead. This poison can be used no more than once per round. The summoner must be at least 7th level before selecting this evolution.