The second Dobby exited the supply closet an alarm sounded. Dobby froze, his eyes expanding in surprise. He heard footsteps from around the entrance area run through the gates.

"What's going on?" A human male yelled, "We heard the alarm and came as quickly as possible."

A goblin replied to him, "We believe that there is the Potter boy and his friends here. The thief's downfall revealed him. They took one of our workers and went down to the old vaults."

"Us guards will stop them", the human replied, "If we catch him then there will be promotions for everyone."

There were cheers everywhere from the halls, all of them human cheers. It sounded like there was hundreds of the guards going to capture Harry Potter. That cannot be good for his health.

Dobby peered the column seperating the closet from the entrance hall. There was one man in dark blue robes, behind him was a whole bunch of people. Dobby's eyes couldn't track them all, but it was easily over twenty men. Harry Potter and his friends could take on maybe ten, but twenty or more? That's playing the odds a little thick.

The leader turned to his men and addressed them: "Today we will capture Harry Potter and his obnoxious friends for the Ministry and their aims. He is wanted for multiple accounts of suspected murder and assault, not to mention stealing from the Ministry itself." He turned back to the entrance to the vaults and shoved his way past the goblins who were standing and watching.

"Let's go get them me-" Was as far as he got while walking before Dobby felt it was time for him to stop. A snap from Dobby's fingers activated the inate magic all house elves had within them. The leader tripped right on his face.

Blood spurted from the man's nose as he flew on top of it, "AAAAGGGGHHHH!" he yelled. Snickers erupted from his followers as they laughed at his misfortune after acting badass.

"Shut it! That's not funny."

Dobby smiled, oh delaying people had it's advantages. He created a hover spell on the leader, lifting him in the air.

"Wha-?" The man said, his black robes flapping around his face as he flew upwards. He ran into the high ceiling at high speed, getting knocked out. Dobby released the magic, letting the leader fall.

The men gasped as their leader fell to the ground from the ceiling. He screamed as he fell, waving his arms wildly as he plummeted.
The ground came up to meet him, and the leader's bones crunched as he hit the ground. His massive faceplant smashed his skull, fractured half his bones, and caused him to become a literal blood puddle on the ground.

"Bloody Hell!" his companions cried out as they witnessed the brutal murder that happened in front of their faces.

They stared at the bloody mass on the marble floor in front of them, and then looked to the goblins, who watched in bloodlust filled glee. To them the wizard deserved it.

"Which one of you did it!" The leader's second in command yelled at the goblins, "Which one of you has a wand! That's illegal you know, and punishable by death!"

He pointed his wand at each of the goblins in turn, anger overflowing against the inferior beings. The goblins ran, sprinting away from the anger driven wizard, they practically flew as he yelled at them.

As the goblins fled the humans began to charge into the mines, flooding the mine carts they used as transportation. Wheels squeeled on the track as they took off, leaving behind the mess that used to be their black robed leader. Dobby saw them run through, only one down and they're set back a leader and five minutes.

Dobby charged his apparation magic, and disapparated once again, he would make no more progress at the entrance area. He dissapeared from behind his column and reappeared near vault number 451, which he knew was halfway down the mine track. Rewarding his knowlege of Gringotts was the sound of mine carts racing down the tracks.

Dobby looked up at the ceiling and noticed the stalactites there, and his mind was struck with an idea. He snapped his fingers and cracks appeared in the stalactites. The weakened bases of the ceiling spikes failed, and several massive rocks slammed into the tracks.
The carts careened down the tracks and hung a tight corner, almost flying off on their own, but barely surviving the turns. Then the first cart's wizards saw the stalactites. Their screams echoed down the tunnels as they smashed through the stone.

The group following them was quicker on their reaction times and blasted the wreck of their companions into dust with the reducto curse.

Dobby watched the cart crash into the stalactite, and saw how their companions completely avoided it, and grimaced. That didn't take out as many as he had hoped, but it had to be enough, he couldn't risk going any farther. Odds are that he at least bought enough time for Harry and his friends to escape. So Dobby sat down and waited.

In what felt like an hour, there was crashes and screams emanating from the cavern. Dobby stood up and stretched out his limbs, wondering what was going on farther down the track. More carts raced down the track, their occupants yelling to each other, "They're down at the Malfoy's vault! Get ready!"

Dobby heard them as they raced by and looked both up and down the track, was there something he could do? In the stone next to him there was a scratching noise, Dumbledore trying to contact him again. In the wall was the words "There's more men coming, Harry and his friends won't be able to handle their job if these men arrive, stop them. -D"

"Yes Dumbledore, sir." Dobby nodded, then stepped out of his hiding spot and onto the tracks.

From a distance he heard the rumbling of carts, almost like a far away thunderstorm, and he just stood there watching. When their noises got closer he began to access the magic running in his blood and started a shielding spell. He could feel the magic flow both in his body and around it, as it created a small bubble of protection.

The carts flew into existence from a turn not ten feet away from Dobby, once again almost crashing. These carts seemed to be filled with both goblins and humans, but all looking to kill or capture the people he was sent to protect. As the carts barreled down the track, Dobby just watched them, but unbeknownst to them there was his magical abilities at play.

The carts charged straight into Dobby's protection spell and crumpled against it, metal screeched as it folded over itself like paper. A volcano of nuts and bolts erupted from the center of the crash.

Only a few wizards were able to jump away from the wreckage and survive, three to be exact. They were in the last cart that had turned the corner, and dived off their cart, rolling as they hit the ground to break their fall. They hit the ground and pulled out their wands as they got up, pointing them at the elf that killed their compatriots.

"What in the world are you doing here!" One of them cried out as they spread out.

"Dobby will not let you touch Harry Potter!" Dobby told him and lowered his protection spell in favor of other more dangerous spells.

"Get 'em boys," Another, this one with a beard, said, "He's just a house elf!"

The bearded one shot out a stupefy at Dobby, who ducked underneath it and shot back his own stupefy. The red jet of light flashed through the air and was deflected to the side by his friend who rocked a bowler hat. The bowler hat man flung a reducter curse after deflecting, which Dobby flicked away on his own.

Dobby ran to the side of the cart wreckage and set up a hovering charm on some bolts that had detached from the carts. The bolts were covered in blood from the other people trying to get past Dobby, and Dobby shot them towards the bearded man. The bolts went underneath his wand to strike him through his chest, flying past his ribs and into his lungs and heart. The man fell down instantly, blood leaving his body and leaking onto the cart tracks. The third man saw his friend fall and shot a killing curse towards Dobby, missing by inches.

Dobby ducked behind the cart and used his hovering spell to launch the mine cart towards the bowler man. The bowler man dived out of the way and threw his own hovering spell at Dobby. It struck Dobby in his chest and launched him towards the ceiling, where more stalactites were waiting for him. Dobby disapparated before impaling on the spikes, and reappeared behind the two wizards as they watched him.

His apparation crack was heard all the way down the tunnel, and the two screams of the remaining wizards were drowned out by it as well. Dobby launched both of them with trip jinxes forwards into the stalactites on the ground, then splashed a hovering charm on the two of them. They were flown upwards with stalactites following, making them into spiky sandwiches on the ceiling where Dobby was supposed to be impaled himself.

Dobby looked at the now blocked cart tracks, completely plugged up by the cart wreckage, and decided that there was nothing else for him to help with here. Another dissaparation crack was heard from the Malfoy's vault, but this was of Dobby retreating outside of Gringotts. He apparated to the roof of the nearby shops, hidden to the naked eye.

From Gringotts there was a massive roar, and a hole opening in the side of it. A dragon appeared from the inside of Gringotts, and flapped it's massive wings to gain height. On its back was three wizards, Harry and his friends. Dobby smiled as he knew his job was complete for now, so he apparated once again back to Shell Cottage, to hide in their wood pile again until Dumbledore contacted him.