Vapourise

You cause all the bodily fluid of an enemy you can see within range to begin to boil. The target must make a Constitution saving throw. It takes 10d8 + 40 fire damage on a failed save, or half as much damage on a successful one.

A humanoid killed by this spell is boiled alive internally leaving scarring patterns across their body of where blood vessels etc. were before bursting. Steam rises from every part in the corpse and the smell of burning flesh fills the air.