Hemokinesis as a field had evolved tremendously in the past thirteen years. Gone were the days when the best hemosapien pathwalkers could manipulate blood to create a few blood spurts here and there. Instead, the cutting edge of the field had learned to manipulate one's blood in ways that were beyond simple projectile infliction.
Rather than simply flinging her blood at her enemies like a tsunami, Arastia changed the very state of her blood from liquid to gaseous, allowing her to rapidly disperse the blood with a tremendous amount of force. The internal energy of the gaseous flood created a powerful form of thrust that, with just a little bit of manipulation, allowed her to fling the expanding gas in the direction of the incoming army.
But that wasn't the main attack.
The main attack was the detonation of each and every blood cell that she had generated as the powerful cloud of gaseous blood struck the homoarachnoid army.
BOOOOOOOOOOM!!!
