You conjure a lance of blazing lava before hurling it at target within range. Make a ranged spell attack. On hit, the target takes 8d6 fire damage. Hit or miss, the lance then explodes in a 10 foot radius sphere of heavily obscuring pyroclastic ash around the target until the start of your next turn. Any creature that start their turn within the ash cloud must make a Constitution saving throw or take 4d6 fire damage and be blinded until the start of their next turn.