It all happened exceptionally quickly. With how far apart they were, even if Leonel had wanted to stop it, he couldn't. Using his Spatial Force to close the distance might have been possible, but the sudden volatile use of Force made it incredibly dangerous to do so. Then, by the time Adawarth started, if he stepped in to stop the process midway, the both of them would end up dying.
Leonel realized what Adawarth was doing immediately. He was using the powerful gravitational force of his armor, concentrating it into a single area, and then using that force to concentrate his lightning into a mighty, unstoppable blade.
That was akin to infusing all the strength of his Divine Armor into his weapon, and though he would lose his Domain as a result, the trade off was more than worth it.
