Exsanguinating Cloud

5th-level necromancy (sanguimancy)   Casting time: 1 action   Range: 100 feet   Target: a spot you indicate within range   Components: V, S   Duration: Concentration, up to 5 minutes   Classes: Cleric, Sorcerer, Wizard   Subclasses:  
When you cast this spell, a rose-colored mist billows up from the spot you indicate within range, obscuring sight and draining blood from living creatures. The cloud spreads around corners. It lasts for the duration or until s trong wind disperses it, endign the spell. Its area is heavily obscured.   This cloud leeches the blood or similar fluid from creatures in the area. It doesn't affect undead or constructs. Any creature in the cloud when it's created or at the start of y our turn takes 21 (6d6) necrotic damage and gains one level of exhaustion; a successful Constitution saving throw halves the damage and prevents gaining exhaustion.