A Certain Scientific Omnitrix, Book 7: Saints of Destruction

Will of Misaka

"Stay away from him.." said Mikoto.. with a growl. "Or we'll have something to say about it!!"

"Your arm.. is broken.." said Acqua. "In fact.. you're all quite injured... 

Mikoto grinned, blood trickling from her forehead. "You'd be surprised what we can do even when we're done on our last breath!"

Mikoto sent a powerful lightning barrage from her bangs, which Acqua parried with his ginormous lance, while Kanzaki leapt aside to dodge the sweeping blow.

"NOW EVERYONE!! GIVE IT ALL YOU'VE GOT!!!" Mikoto screamed.

Rex yelled and jumped into the sky activating his Punk Busters and diving down at Acqua, using his massive robot legs to aim a devastating double kick at the Saint.

Acqua rolled aside, dodging the powerful blow before swinging his lance at Rex's side.

But Mikoto used an electromagnetic pull to suddenly pull Rex out of the way, causing Acqua's blow to hit empty air, right as Vento swung her Wind Hammer in an arch, and a powerful wind blast came down at Acqua from above.

Acqua powered through the wind blow while at the same time twirling his ginormous lance to block blows from Kanzaki who had dashed into the fray. After knocking Kanzaki back with a furious powerful blow.. Rex and Mikoto closed in from either side.. 

Mikoto lashed out her unbroken arm, and a ginormous cyclone of Iron Sand tore from the ground, while Rex lashed out a massive metal punch with his Smack Hands. 

Acqua used his lance to shred the Iron Sand cyclone apart, while using his other hand to block the Smack Hand with a booming shockwave.

Acqua gripped the giant robotic fist, and swung it into the air, throwing Rex into the sky as he dashed at Mikoto for the attack..

But just as this happened, the incredibly injured Eatle rose up in front of Acqua, and sent his horn bashing against the lance, parrying it.

"BEN!!" Mikoto stammered.

"Not leaving you to fight alone!!" There was a flash of green light... and Ultimate Echo Echo appeared.

"ULLLTIMATE ECHO ECHO!!!" Ultimate Echo Echo thrust out both his hands, and a devastating sonic blast exploded out and hurled Acqua back..

"WAY TO GO BEN!!" Rex yelled as he spiraled back down, activating his Big Fat Sword.

The BFS's blade clashed with Acqua's Lance, and the two exchanged blows for a minute, swinging their massive weapons at each other, parrying each other's blows.

"ALRIGHT!! HERE'S A LITTLE EXTRA!!!" Rex roared. In an instant.. the sword's blade transformed, turning into a spinning buzz saw.

The giant BFS buzz saw mode grinded against Acqua's lance, throwing up powerful sparks as the friction increased. 

"ANY TIME VENTO!!" Rex roared.

"FOR GOD'S SAKE BE PATIENT!!" Vento screamed emerging behind Acqua, before she lashed out her Wind Hammer, and a powerful set of wind bludgeons blasted into Acqua's back, causing him to buckle to his knees. 

"NOW!!!" Rex roared as he leapt aside and Kanzaki blazed past him.

There was  slash.. and flecks of blood flew by as Kanzaki's sword slashed a gash in Acqua's side.

"Impressive.." Acqua muttered as he noticed his cut.. and Rex came down from above for the final blow.

Acqua spun his Lance in his hand like a ginormous staff,  creating ultra powerful shockwaves that sent Rex, Kanzaki, and Vento hurling back.. but no sooner had this happened, when a rain of lightning exploded down upon him..