You hold up your hand and blow across your palm, as though you were blowing someone a kiss, causing a cloud of death and decay to spill out in a 45ft cone. The cloud spreads around corners and persists in that space for the duration.   When a creature enters the spell’s area for the first time on a turn or starts its turn there, they must make a Constitution saving throw.
On a fail, they take 3d6 necrotic + 2d6 poison + 2d6 cold damage, and their speed reduces by 10 feet until the spell ends.
On a success, they take half as much damage.