Enterna Flamme

You conjure an invincible flame that cannot be extinguished by any means short of a wish spell. You can target one creature or object within range. The target is engulfed in flames, taking 8d8 fire damage per round. The flame cannot be put out, and the target continues to burn until reduced to ashes or until a wish spell is used. The fire created by this spell spreads to other flammable objects, which also cannot be extinguished.