You can obtain the Poison trait in Dungeon Village 2 in your city by Chewy Mushroom, taming Arachnon or Scalene as pets and hosting event Mushroom Picking. Worth 10 points each, Arachnon, Scalene and Mushroom Picking are the most points for acquiring the Poison trait.
The Poison trait is a requirement for four titles, including High Risk, Ghost Town and Adrenaline Town.
The exact amount of points for each factor in the Poison trait is listed below.