To add. STW states that it activates on any status effect. Posion would count as a status effect.
I need to retest on poison gas arrows because is a status effect. Usually i wear a mask. Shoot the gas arrows and go into melee in the fog. So i might be just killing things with my two hander to fast to check or notice.
Yeah, but it is not really the same as the basic 3 status effects, which is what lead me to think it does not apply, but it seems I was wrong (will test it myself though to make sure). As for the noxious gas, I don´t think that applies, because it is not a status effect on a player, but rather an area, which gives it to players who enter it for the time they stay in it. Also, since you do not apply that status effect directly, I wouldn´t be surprised at all if CE weren´t able to determine that you were the source of that status effect, hence your STW should trigger. But test it and we will see