Just as he was thinking about this, a thick and intense divine aura exploded forth, out of Leo,
Divine aura!
An aura of a God-blessed, the fear and weakness of him and his undead.
The aura was filled with thick blue mana, exploding out with Leo at the center...
If one looked at this sight from above, it would look almost like a circular ripple, with the ripples being the aura.
Though Nux did not know what that energy (Mana) is, it was the aura that scared him most, Divine aura, is the nemesis of all undead.
Before he could make do with what was happening, Everyone was sent flying by the aura as it erupted with full force out of the crystal fused with Leo's soul, including him. With the death knights and bone warriors suffered the most damage.