Disclaimer: Teenage Mutant Ninja Turtles and Mass Effect do not belong to me. They belong to their respective owners, namely Viacom and Bioware.

Warehouse 2758, Factory District, Tayseri Ward, the Citadel, Widow System, Serpent Nebula.
February 21st, 2183.

The two sword-welders circled each other, each of them neither keeping their eyes off the other, for they were constantly analyzing each other in a still-eyed focus. They kept a steady space between each other, keeping a firm grip on their swords and ready to pounce.

The tense silence and the waiting, that occurred, could have been cut with a knife.

But the waiting ended, as Leng immediately charged, holding his sword high above his head. And when he got close enough, he swung downwards.
Leonardo, however, was quick to react, and brought his left katana to block Leng's ninjato.
And then he began swinging and slashing with his right katana, all the while blocking Leng's blade, intent on throwing him off balance.

But Leng halted his attack and backed off, to which Leo tried to exploit with an attack.

Blades started clashing with each other, as both opponents started slashing at each other, attempting to make sure their blades drew blood.
Both opponents were skilled at defending from an attack, but however, Leng outmaneuvered Leo and slashed at his upper left arm.

Leo yelped momentally as he soon backed off and looked at his wound, which blood was slowly coming out of.
Then, he looked at Leng and, wasting no time, started counter-attacking.
But his opponent was quick to defend, with his Ninjato blocking and countering every slash, swipe and swing from Leo's two katanas.

But Leng exploited weaknesses every time it showed and obtained more hits on Leo, the first being a sideways swipe on Leo's lower right arm and the second being an aggressive diagonal slash.
With two hits in quick succession, Leo was thrown off-guard by his opponent's aggressive attacks, and Leng took advantage to make an aggressive swipe at Leo's legs, aiming to incapacitate Leo with hits to his thighs.
But Leo was quick to defend and deflected the Ninjato away from him, momentarily, as so to give him a few seconds to catch his breath and get back in the fight.

However, Leng was not foiled for long, as he immediately went back on the offensive and Leo started defending.
Already five minutes in, and Leo's vigorous defence was already starting to drain him and make him feel fatigued, due to the aggressiveness that his opponent put into his attacks, and that he just didn't seem to let up.
Hamato Leonardo, the eldest of his brothers, the sword-welding leader, was in a fight for his life, it seemed.

But relief was coming, as behind him, three turtles were now getting back up.
Donnie, Raph and Mikey, saw that Leo was an intense clash with the mysterious sword-welding guy who pretty much kicked their shells with seemingly no effort at all.
Getting their discarded weapons back, the three Turtles thought on what to do, until Donnie took the initiative, taking his brothers by the shoulders and whispering, "Guys, gather around, I got a plan".

Huddling up with Donnie, Raph and Mikey listened intently as Donnie told them his plan.
"Alright, Leo's keeping that guy busy, but it's not going to last forever. So, here's the plan. I'm going to attack first..."
"What? Why do you get to attack first"?
Ignoring their groans, Donnie sighed and continued, "You'll be next, Raph, and then you, Mikey, you'll come in last. Use your biotics".
"Oh, okay, that makes sense".
"Of course it does. Anyway, when you attack, just attack and lay down your hits on that guy, and don't linger. Remember, it's about hit and run attacks this time. Everyone got that"?
"You got it, D".
"When do we start, Don"?
Nodding his head, Donnie then went, "Alright. Get ready. Stand behind me, and wait for me to do my attack, then you go next Raph, and then you, Mikey, go right after Raph. Okay"?
"You got it".

And meanwhile, back in the fight between Leng and Leo, Leo was intensively defending, when suddenly, Leng made a mistake and Leo exploited it to swipe at Leng's face. His left katana hit the right side of Leng's lower jaw, from the cheek, right down to his chin.

Caught completely off guard, Leng growled.
And both opponents stopped in place, with Leo settling to face Leng down with a glare.

Noticing a droplet of blood trickling down to his chin, Leng dipped his finger and brought it up to his tongue, which licked the blood off.

To Leo, it was very chilling.

"NOW"!

The sudden shout made Leo and Leng's heads snap to it's origin.
Donatello charged into the fray, twirling his staff around rapidly until he managed to swing it to smack Leng square on his face, hitting him at the nose.

Disorientated, Leng was thrown completely off-guard, and didn't get a chance to catch his breath as Raphael leapt and laid down a cross at him with his right fist, and afterwards, came the hum of biotic energy and Leng felt himself being pushed right back from an biotic blow laid onto his chest.

Hitting the walls of the warehouse, and slumping down, Leng felt the wind knocked right out of him.
He hadn't been hit this hard since training.

Aching all over, but most particularly in the chest, Leng slowly turned his head around to try and look for his Ninjato.

Looking over to the right, he saw it on the floor, but slightly out of his reach, so he slowly inched his hand to grab onto the handgrip of the weapon, in order to bring it closer to him.
But his chest started aching more and more as he leaned to grab the sword.

So, he got onto his omni-tool and started the procedure to activate his armor's medi-gel injectors. Activating the medi-gel, Leng felt the instant cool appliance of the gel onto his body and the aching on his chest starting to lessen.

And thus, he looked at the Turtles and, convinced that they weren't too concerned on him, reached for his Ninjato, grabbed the hilt with his right hand, and when the aching disappeared, immediately got up and charged for them.

"Look out"!

Donnie shouted out his warning, and then, along with Raph, flung out shuriken towards their sword-welding foe, who raised his left arm, thrust his left palm blaster out and emitted a kinetic barrier, stopping the shuriken from reaching him.

Leo quickly rushed into him and tried to swing both his katanas at Leng, but Leng instead got his left hand to ensure that two hands were gripping his ninjato, and then blocked Leo's swings.

Withdrawing, Leng then unexpectedly began attacking aggressively, showing no sign of letting up, and it threw Leo off balance, so much that he locked his right katana with Leng's ninjato in such a way that Leng began pushing.
And suddenly, Leng released his left hand, grabbed Leo's right hand and twisted it, hard, making Leo cry out as he let go of his katana.
And soon, Leng locked blades with Leo's left katana, twisted it and made it fly out of his left hand.
Leo, cried out again, and thus, Leng took the advantage to quickly put Leo into a chokehold, his right arm around Leo's neck and his left hand holding his ninjato, which was positioned near Leo's throat.

And then, suddenly, the Cerberus operatives, armed and armored, burst in from the main entrance and several doors elsewhere on the ground floor of the warehouse.
"Close in, close in, go go go"!
"Targets identified, awaiting further instructions".

Soon enough, the three Turtles, displaying their weapons, back to back, were now surrounded.
And furthermore, Leonardo, their leader, was now in the firm grip of the sword-welder, not struggling.

Kai Leng, satisfied with the plan, now issued an ultimatum, "Turtles! Drop your weapons. Or your, brother, will die".

DUNN DUNN DUNN!

Yeah, apologies for the delay everyone, but I was having trouble trying to figure out on how to make this chapter work, as well as trying to make sure that the duel between Leng and Leonardo was done correctly.

So, anyways, don't forget to leave a review whenever you can, and see you next time.