SFS Standard Coat In Bile [one-action] Feat 1

Frequency once per day
Requirements You're wielding a weapon that deals physical damage.

You coat your weapon or its ammunition in your toxic stomach fluids, which remain potent until the end of your next turn. The next time you successfully Strike a creature with the required weapon within the duration, if the Strike deals damage, you deal an additional 1d4 poison damage to the target. At 3rd level and every 2 levels thereafter, this damage increases by 1d4.