Altraxia
The beams of energy appeared to be somewhat effective, often damaging the ship's hull albeit most of the impact was absorbed by the plasma shield of the alien vessel, however the beams easily hit the laser cannons, destroying them completely along with most of the ship's frontal armor and a few components, impairing the overall state of the starship.
As the ship got near the halfway point of it's close range flyby, it activated it's stronger directional engines and send itself into a deadly spin to direct itself onto target with it's deadly spinal weapon. The craft immediately energized the heavy cannon as it got closer and triggered it at the closest point possible to the magnaspawns. The blast of the weapon was huge, creating a giant cloud of ionized plasma quickly that attached itself to the battleship's plasma shield. The main projectile, a bolt of colorful gay plasma about the width of the ship was however carefully aimed at the enemy combatants in hopes of vaporizing them.
The craft quickly turned around after the initial shot, though it was now largely unarmed as it's shield was dissipated by the powerfull magnetic release of the plasma weapon and it's laser cannons destroyed.