Spartan Trailblazer in the plains of Halo pt4

With several pulled hinges and a strong kick, the door buckles and the spartan and his marine rush in to find a squad of marines huddled together with weapons drawn. What almost became a bloody friendly fire incident, quickly became a rushed introduction.
"A Spartan?! Thank God!"
"Marines, status report."
"Well, we've been huddled down here for-"
Conversation ceases as a blue glow begins radiates from behind. The spartan turns and comes face to blade with an energy sword wielding Ultra.
"Ambush!"
He barely dodges: His shields take a glancing blow, knocking them half out. He rolls, making distance, and spins around, ready to engage. Luckily, the marines were still on edge from their last encounter and take the opportunity to thoroughly eviscerate the attacker. The spartan jumps up.
"We need to move, there'll be more."
"Let's go squad form up on the spartan!"
They rush out the facility as the first electrical crack of many strikes down the leading marine, easily searing through his armor, singing flesh.