Hypersensitive Smell

Your sense of smell is more sensitive than usual, giving you a +(IE) on Wisdom (Perception) checks related to smell but a −(IE) penalty on all saving throws against gasses and other smell-based attacks.

Real-world Examples

Hyperosmia

Assistive Options

Wearing a thick mask that filters the air and is infused with pleasant smells (e.g., plant oils or potpourri) can reduce this sensitivity by 1 IE for 10 minutes, but it must then be thoroughly washed and replenished before gaining the benefits. Wearing such a mask beyond that time after exposure to a gas-based attack gives an additional −1 penalty on all saving throws against gasses or other smell-based attacks.