Responsibility.
"Cross Impact!"
Ikaris unleashed her attack with a roar and disappeared as soon as she did, returning behind him and releasing another [Cross Impact] against his back and then cancelling the summon of the twin swords with a wave of her hands.
Usually, her attack would travel at relative and easily avoidable speeds, which is why she had made a task of utilising it in a scenario where her opponent was distracted or unable to avoid it from either injury or were unaware of its approach; but not this time, [Cross Impact] moved faster than Nine could react, and all four of the arcs of mana tore into him simultaneously, the first two collided in his raised arms rendering them unusable as they pushed him into the other two behind him that had somehow grown even larger.