Bryan's Dragonfire

Create a toxic cloud and instantly ignite it with a carefully placed hazardous spark, causing a powerful explosion of fire and poison with a 30ft radius. Any creature caught in the blast will receive 4d8 poison and fire damage(2d8 fire and 2d8 poison). Half as much if Dexterity saving throw is passed. On failure, any creature caught in the blast must also make a Constitution saving throw or receive the Poisoned status effect, and suffer 1d6 lingering poison damage for 3 rounds, on a successful save, does not get poisoned.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.