Aris blocked Rasmus's attack, and it was enough to push her a bit. She was shocked and excited at the same time when Rasmus slowly caught up to her. She had been waiting for this moment, to have a proper opponent to spar with ever since she lost Illidan.
She coated her greatsword with Aura and let the Mana sip into the blade. Both Mana and Aura coexisted on her blade, creating a stream of silver with blue-ish hue color around it.
Rasmus knew how intimidating it was to see Aris in her battle stance even before he could see Mana. Since he could see Mana, that only made it worse because he could see the immense pressure and energy that she released.