User blog comment:Metadwarfosis/In anticipation of volume 11- Dwarven Kingdom and Expectations/@comment-29037426-20160801012958/@comment-26952857-20160802121952

also i think it was mentioned somewhere that most dragonlord were killed by the 8 greed kings and that the dragon lords that survived are thouse who didnt participate in that war

its from intermission in volume7, when rigrit asked: "can’t you ask for assistance from the other dragon lords?"

PDL answered:

"My answer is the same. It is difficult. To be frank, the ones who survived thus far are the ones who did not fight the Eight Greed Kings back then. ..."