When using a Ghastly Longbow at night, the “blue flames” effect is much larger on the bottom half of the longbow than the top half.
After firing a shot, the entire “blue flame” effect will often vanish, and not return till after the weapon is un/re-equipped. Weapon swapping has no impact.
This can be produced 100% of the time.
My class is warrior. My ghastly longbow has not been transmuted. The other few Ghastly weapons I have, display properly.