Neither of the twins knew how strong Sun and Moon Obliteration would be at this point in time. The last time they used it, they weren't even in the Transition Realm, after all.
Sun and Moon Obliteration basically used the twins' Light and Dark Elements, clashing them against each other. Usually, Rean and Roan's Dark and Light Elements worked together and complemented one another. However, even though that was the case, they were two opposite elements. In this specific attack, Rean and Roan allowed them to go berserk, forming a devastating power.
With that, Rean and Roan spaced themselves from each other as they brought their weapons out. They both raised their weapons high, gathering Dark and Light Elements as much as possible. Their weapons, of course, helped with that stage a lot.
'Death Style!'
