R: Touch D: [dice] x 10 minutes

You tag a creature with radioactive isotopes, poisoning it for one round and allowing you to locate it based on radioactivity within 200’ for the duration of the spell. The creature cannot conceal itself from you as long as it is affected by the tag.

If 4 [dice] are invested in this spell, the effects are permanent.

radioactive + tag

From The Unlawful Games’s Radiomancer