Azure Flame

Choose a point within range. All living creatures within a 30' sphere that are not behind full cover must make a Dexterity saving throw (undead and constructs are unaffected by the spell). On a success they are immune to the effects of the spell. On a failure, the creatures immediately burst into blue flame, which burns until extinguished by dispel magic, remove curse or any spell above 3rd level that states it extinguishes magical flames. Lifeless items do not burn, however burning creatures take 1d6 points of fire damage each turn until the flame is dispelled. If a creature is killed by this spell, they crumble into a pile of blue ash from which they cannot be resurrected.