**A.N: All chapters has been fixed. Reload the last chapter. Sorry for the inconvenience :(**
With the twins attacking simultaneously, and thanks to Grey who has already told them of the locations of the people they needed to attack, it was very easy for them to take out two of the strongest Sovereigns with just one attack each.
They've prepared for the attack for a while so when the opportunity arrived, they didn't hold back and attacked with everything they had. The duo they attacked didn't even have the chance to see what was happening before their visions faded. They died on the spot.