Ogudomon
What is the problem?
7 Blades? How to get them? And the fusion is between two Demon Lords? Or must be two in particular?
All demons lord exept leviamon x and belzebumon burst mode
I figured it out. You must go the 7 Demon Lords Challenge, get the seven blades (each has one) from each demon lord and then make two of the seven demon lords be fused.