User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-73.49.181.88-20150128161918/@comment-73.178.133.185-20150129205047

Jop, your argument actually support services the possibility since it would make sense that Blade Blacksmith wouldn't be available if it was a part of Sword of Betrayer. However, there seem to be hints of the possibility of SoB being wielded by Glory Drag Trooper in the near-future, so no it is not a combo. As for Holy Eraser, that sword is a creation of Sword Birth (and probably could be recreated in holy form by Blade Blacksmith or holy-demonic firm by SoB) thus it is not exclusively an upgraded. Besides the absorption ability is different from Holy Eraser, which simply erases holy power (as indicated by the name). However, those ideas were pretty interesting nonetheless.