As promised, a couple of days later, just as Harry was about to meet The Seven in the Entrance Hall on their way to dinner, Lee approached him.
"The costume is ready and in the antechamber off the Entrance Hall. Do you know the one?" he asked.
"Yeah, it's the same one I met with the twins to get the costume to you," replied Harry.
Nodding, Lee grinned and said, "If I may suggest, wait until the Great Hall is full and the meal is served, then make your big dramatic entrance."
"That's the plan," replied Harry. "However, I'm not going to know when that is."
"I've got that covered," said Lee. "I can see the door to the antechamber from where I sit at the Gryffindor table. I've been practicing a Knock Jinx that will allow me to knock on the door from where I sit. That'll be your cue."
Grinning, Harry said, "And the final piece of the puzzle falls into place. Excellent, Mr Jordan! And thank you, very much!"
Harry joined the others and said, "You folks go on in. I need to get ready for my prank on Dumbledore."
"You're still going ahead with it, then?" asked Daphne.
With an emphatic nod, he replied, "Yes. This should prove very interesting."
Daphne gave him a quick peck on the cheek as the others started heading off. She quickly joined them.
Harry paused for a moment before he gave a quick grin and ducked down to the antechamber.
Once inside, he quickly closed and latched the door before turning to see the opened package sitting on the floor. He quickly stripped down to his underwear and hoped no one decided to be adventurous and have a look inside.
Quickly dressing into the costume, he waited until he felt it resize to fit him like a glove. He cast the Cantrip that would make his cloak billow, the one to make his hair lay better, the one that gave him the twinkle in his eyes, and finally the one to make his teeth sparkle when he smiled. He knew it was overkill, but he was going for overkill. Lastly, he stood with the helmet tucked under his left arm, waiting and hoping the knock would come soon.
It did. Right then.
A little surprised at his anticipation, Harry waited a few moments before donning the helmet with the mirrored eye openings, opening the door and marching out. As soon as he started to move the Imperial March broke in.
In the Great Hall, all eyes turned to the double doors as soon as the music started. Harry entered and, without breaking stride, marched with his head held high up between the tables towards the head table.
Out of the corner of his eyes, he noticed quite a few wide grins on some faces. Faces that also turned to those sitting either side of them and whispering. The muggle-raised were telling their table mates just who Harry was dressed as.
Almost perfectly on a break in the music, Harry came to a halt on the open space in front of the head table. He paused a moment to take in the looks of shock on the faces of some professors, and dropped to one knee with his head bowed.
Lifting his head to look in Dumbledore's stunned face, he said through the voice altering charm the twins had placed on it, "I, Darth Vader, Dark Lord of the Sith, present myself to you, Emperor Dumbledore!"
"Whaaat?" spluttered Dumbledore, visibly flinching. "Dark Lord? Emperor?"
"I said..." began Harry/Vader, before he rose and said, "I was informed, Emperor, you would be conducive to an audience!"
"Whaaa...?" spluttered Dumbledore. "I'm not an Emperor!"
"Ha! You jest, my Lord," retorted Harry/Vader, before he pointed a finger at Dumbledore. "Who else but an emperor would seat themselves upon a throne made of gold!"
"Nooo...!" exclaimed Dumbledore. "This is the seat of the Headmaster! I'm not - an Emperor!?"
"Well!" snarled Harry/Vader imperiously. Playing it right up with as much flourishing as possible, he said, "I came here hoping to forge an alliance between my forces and your own. I believed that, together, we would become Masters of the Universe! Clearly, I was mistaken. I am left with no choice but to crush you under the heel of my boot! Good day, Sir!"
Quickly, Harry/Vader spun about, threw his nose – breathing apparatus - into the air, and stormed back out; the Imperial March echoed through the Hall. As he passed the doors, one of the twins banished the doors closed for him.
"Noooo...!" Harry heard the Headmaster call out as the doors closed.
Quickly, he dashed across the Entrance Hall and back into the antechamber. Hurrying, he changed back out of the costume and into his Hogwarts robes before ducking back out of the room.
Harry left the Great Hall amidst riotous laughter and merriment. The head table was all afluster, still.
Quietly, he ducked back into the Hall and, staying crouched, made his way between the Gryffindor and Ravenclaw tables to take seat next to Daphne. No one at the head table appeared to have spotted him come in or find his seat.
Hermione, trying to stifle her laughter, had tears in her eyes and was red in the face. She couldn't even look at Harry.
Daphne looked at him with her eyes twinkling and said, "I think you broke the Headmaster."
"Why, what happened?" asked Harry trying to act innocent.
Neville replied, "Madam Pomfrey had to escort him from the Hall out the teacher's door. I think she was taking him back to his office. He looked pretty shaken up."
Harry looked up at the head table and noticed Professor Flitwick was looking at him and grinning like a loon. Professor Snape was sitting with his head down and a slight smirk was on his face he was trying to hide.
Professor McGonagall was sitting with her elbows on the table and her hands covering her face. The slight jiggling of her shoulders informed anyone paying attention she was trying hard not to laugh aloud.
