User blog comment:Cosmicsilver/Expectations/Hopes Dark Souls 2/@comment-1687225-20121221044719/@comment-1687225-20121224040839

You get lightning spear, great lightning spear, and sunlight spear. Of these, Sunlight spear is the only one you can't use when you're outside of the covenant. In that sense lightning spear and great lightning spear are similar to the chaos storm and chaos great fireball that can be obtained from the Chaos Servant covenant.

It is true that sunlight bros are more favored than regular white phantoms, but as this game is in its waning years, I'd be lucky if I found ANY phantoms to summon for certain bosses. :(