User blog comment:LordLuminous/Fairy Tail Chapter 411 Theories and Predictions/@comment-7418318-20141123173547/@comment-31.61.138.122-20141125152858

Or - Lumin Histoire sucks in both dragons in return for Natsu and Gray. Kills many birds with one stone, so to say. Although then it would be more qui pro quo than quid pro quo.