Arrow of Ash

You create and launch a missile of hardened ash which travels toward one creature you can see within range. Make a ranged spell attack. On a hit, the target takes 3d6 force damage and 3d6 fire damage. When the ashen arrow reaches the target, it bursts into a 30-foot-radius cloud of ash centered on the target, regardless if the attack hits the target. The could of ash spreads around corners, its area is heavily obscured, and it lasts up to 1 minute.

When a creature enters the cloud for the first time or starts its turn there, that creature must succeed on a Constitution saving throw or become poisoned until the start of its next turn. A moderate wind (at least 10 miles per hour) disperses the could after 4 rounds. A strong wind (at least 20 miles per hour) disperses ist after 1 round.

At Highter Levels. When you cast this spell using a spell slot of 6th level or higher, the fire damage increases by 1d6 for each slot level above 5th.