Q677

When looking over the Skeleton template for creating undead minions, I am curious. It states that "A skeleton retains none of the base creature’s special attacks."
And then it then states that "A skeleton loses most special qualities of the base creature. It retains any extraordinary special qualities that improve its melee or ranged attacks."

While this seems for the most part straightforward, I have not been able to find a single example of a Special Quality that DOES improve it's melee or ranged attacks (all effects that affect attacks seem to be under the Special Attacks category), and I'm curious if I'm missing something.

Does anyone know of a specific example of a special quality that WOULD be kept by an undead creature?