For the duration, you can sense the presence and location of poisons, poisonous creatures, and diseases within 10m of you. You also identify the kind of poison, poisonous creature, or disease in each case.

The spell can penetrate most barriers, but it is blocked by 30cm of stone, 2.5cm of common metal, a thin sheet of lead, or 1m of wood or dirt.

(If you have the Ritual Casting feature, then this spell can be cast at its lowest level as a ritual – if you increase the casting time by 10 minutes, then this spell doesn't use spell slots.)