Asbestos

You blow asbestos into the face of who you choose, the recipient must roll a CON save. If the recipient succeeds they only take 1d8 necrotic damage, if the save fails they take 1d4 necrotic damage at the start of each of their turns for 2 minutes as they slowly suffocate from not being able to breathe because its asbestos.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, another 1d6 necrotic damage and 2 more additional minutes added for each slot level above 1st. This damage applies to both the damage on a successful save and a failed save and the start of each turn on a failed save.