You exhale an arcane disease towards one creature that you can see within range. The target must succeed on a Constitution saving throw or be poisoned. While poisoned in this way, if a creature starts its turn within 5 feet of an affected creature it must make a Constitution saving throw. If the creature fails, it also suffers the effects of this spell.
If a creature affected by this spell dies, the spell ends for that creature. Successfully casting dispel magic or lesser restoration on a creature will end the condition and this spell's effects on that creature. If a creature successfully casts dispel magic on you, the spell ends for all affected creatures.
At Higher Levels. If you cast this spell using a spell slot of 4th level or higher, the duration is concentration, up to 10 minutes. If you use a spell slot of 5th level or higher, the duration is 8 hours. If you use a spell slot of 7th level or higher, the duration is 24 hours. If you use a 9th level spell slot, the spell lasts until it is dispelled. Using a spell slot of 5th level or higher grants a duration that doesn't require concentration.