Wandering Plague

You create a new disease that carries the effects of all negative conditions, spells, poisons, curses, diseases, and similar effects to nearby enemies. All living creatures within 30 feet of the target (except you) make a Constitution save or contract this new disease, gaining all of the effects for the same duration as the effects on the target. Any of the effects transferred by this disease that are from concentration spell effects end if the concentration spell is dropped. This spell counts as a disease. The GM is the final arbiter on what effects can be spread with this spell.

You may cast this spell on the same turn that you cast another spell of 1st level or higher, but only if it deals necrotic, poison, or shadow damage, or if it inflicts a curse, disease, or the poisoned condition.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you may exclude one creature in the radius of the spell's area from crontracting the disease for each slot level above 2nd.