Disclaimer: I don't own anything, all this wonderful HP world belongs to JK Rowling.

Hello! My first story about HP, I decided to focus on Bellatrix, and there will be different things coming up. Starting right away with Bellatrix at the beginning of the First Wizarding War.

I don't really know what I'm going to write here, but I'm quite sure rating M (or T at least) will be needed, plus we all love violence and sadistic Bella -I know you do, don't lie to me.

For now I leave you with a 18 years old Bellatrix, and I'll see you in the next chapter!

CHAPTER 1: Teach me a lesson

1969

He crossed her gaze and she suddenly bowed her head, staring at the dark marble floor. She had never felt so naked, so vulnerable and weak. He slowly circled her, never uttering a single word. She stood in the middle of the almost empty room, her hands slightly shaking, her back straight, shifting her weight on her feet every ten seconds. He was powerful, He was strong, intimidating, and yet strangely comforting with the way He contemplated her, His eyes shining with satisfaction. He looked at her as if she was of great interest and she felt His irises cutting through her flesh like thousands of knives.

The 18 years old Black lifted her gaze when He cleared his throat and fell face to face with iridescent red eyes. A shiver ran through her spine.

'Well, I must say I appreciate your demand to join my army Bellatrix.'

Her cheeks flushed right away and she dropped her eyes once again; the immense honor of maintaining her gaze on His was not hers yet.

'However,' He hissed 'I must make sure that you are not to betray me.'

Bellatrix felt her heart miss a beat and immediately fell to her knees, bowing before Him. Her long curly black hair spread around her slender form, her nose touched the floor and her hands hit the cold stone in a loud noise echoing in the silence.

'My Lord, I am Yours and my life be given for you!'

Her breath was fast and irregular, she didn't want to disappoint Him in any way. She heard Him move and felt His hand on her scalp, his fingers lightly touching her skin. She twitched.

'I believe you, but you may prove your loyalty to me.' He whispered. 'Give me your wand.'

His command made her eyes burst open. My wand? But—

She appeared to be too slow to react, when His fingers grabbed her hair and pulled her sitting straight, where she lost herself in His gorgeous eyes.

'Give. Me. Your. Wand.'

This time, the young witch did not hesitate and handed him a long, slightly curved wand. He held it before Him for some time before throwing it at the opposite side of the room. Bellatrix's eyes followed the path of the wooden stick until it hit the floor and suddenly felt like a part of her was gone temporarily. The grip on her hair tightened and He brutally pulled her standing straight.

'Well, at least you can obey orders.'

For the first time in her entire life, Bellatrix was scared. She would never admit it, but when He violently threw her at his feet with a grin, she was afraid of Him, of what He could do to a wandless little witch. She landed on all fours before her face could crash on the floor and turned around. Never turn your back to Him, never, never. Face Him and you shall be trusted.

He muttered a word, barely audible and yet so effective.

'Crucio'

Bellatrix fell on her back, instantaneously overwhelmed by a wave of excruciating pain. She had never felt so much pain at once before and she almost doubted she could endured this much. It felt like her bones were being broken one by one and she knew she could hear them cracking, as much as she felt her skin burn and her head on the verge of exploding.

Her scream echoed against the stone walls, a shrieking call for the help she would never receive.

It stopped. As sudden as it had started. Her head was burning, her heart pumping at an erratic rate, her nails broken and bloody after scratching the floor in vain in search for something to hold on to.

'I believe you had never been through the Cruciatus Curse, am I right?' He asked calmly.

Trying her best to catch her breath, Bellatrix managed to whisper a 'yes' between her dry lips. The pain overwhelmed her once again, sending her whole fragile and convulsing body in a raging fire.

'Yes My Lord!' He shouted when he released the curse. 'Say it!'

Bellatrix rolled on her back and stared at the ceiling. 'Yes My Lord!' she cried at the top of her lungs, still in a broken voice.

I am His, I am to serve Him, He is my Dark Lord, my Master, and I am His servant, His faithful minion who would defend Him until Death shall overcome me. And I am strong, I would not defy Him but I shall show Him my power; I have to show what I can do to my Mighty Dark Lord.

Ignoring her aching muscles, Bellatrix stood up, continuously bowing her entire being to His supremacy.

'I shall serve You faithfully My Lord, I live only to please You.'

Through her mane, she saw the pleased smile on His face and blushed.

'That is what I wanted to hear from you Bellatrix,' He responded, 'Please myself, then.'

He waved his hand above his head in a gracious gesture and the door behind him slowly opened. Two Deatheaters entered the room as Bellatrix collected her wand on the floor. They were carrying a limp body, which they dropped before the Dark Lord. It was a woman, probably in her mid-forties, her face and clothes covered with her blood and she seemed barely conscious.

'Emily Dawers.' the Dark Lord pointed at the woman, 'The Mudblood, we suspect, informed the Order about our plans.'

The woman on the floor didn't move but Bellatrix could see her shiver. Mudbloods, all traitors.

'Take care of her.' He commanded.

Bellatrix rushed over the woman and kicked her in the face to have her lying on her back. Emily whimpered and opened her eyes in pure surprise, crossing Bellatrix's brown irises.

'Hello, Muddy.' She said in a sing-song childish tone, before suddenly kneeling over her and clutching her throat. Emily caught Bellatrix's wrist, a horrified expression on her face, gasping for air.

'What did you tell the Order?' the young witch asked brutally. 'What did you tell them?'

'I-I didn't sa-say-'

'LIAR!' she shouted, her curls caressing her prey's face.

Bellatrix stood up again and pointed her wand the lying woman.

'I know you lie, you cannot trick me, so tell the truth Mudblood!'

A tear ran down Emily's cheek who couldn't contain her sobs. Raging against the woman, Bellatrix glanced at Him for approbation before following His path.

'Crucio' she whispered.

Emily screamed and her body twisted on the marble floor, her spine and limbs cracking every now and then.

'Crucio!'

I can't stop, I am too powerful, this feeling of power and superiority I felt like never before. Of course, she had use the Cruciatus Curse many times before but on animals, never on a human being. And now she enjoyed it, every pore of her body was in ecstasy at the view of the tortured Mudblood at her feet.

'Tell me you filthy traitor! Crucio! Crucio! CRUCIO!'

Her smile never stop growing wider and wider as Emily was crying and begging her to stop; but she was not going to stop, never, not until she heard what she wanted to hear.

'Please stop I don't know anything!'

But her broken voice kept fading and soon, only silent cries passed through her lips. Bellatrix released the Curse and panted heavily. It was so exhausting, she was not used to this!

'Kill her.'

Bellatrix raised her head and nodded. She had to make that one count, though. She took her silver knife out of her belt and kneeled once again beside the Mudblood. Your blood is so filthy it deserves to be drawn, and He shall be proud, I shall please Him.

'Please…' Emily cried.

Bellatrix raised the knife over her victim and stabbed her right in the heart. She never looked away from her eyes while she could see the life slowly escaping them. Blood splashed on her forearms and face as she stabbed the woman once, twice, until she had no more untouched flesh to damage. She withdrew her knife and contemplated the bloodstains, eventually licking the blade.

'Very good, Bellatrix.' the Dark Lord greeted with a smile.

The latter bowed her head, honored.

'Your faith is true and I see great magic qualities. However,' Bellatrix stiffened, 'I must know how long you can resist me.'

Before Bellatrix could try to understand, she fell on her knees and clutched her head at the invasion. Legilimency. She tried to fight, but her occlumency skills were pretty weak despite all the efforts she has made to learn it by herself. She didn't stand more than a minute before He could fully read her mind, running through every single childhood memory. When He let go of her, Bellatrix was more exhausted than ever. I have failed, I am not worthy enough for His army, I am useless-

'You indeed have a great potential in the mastery of occlumency.'

Bellatrix stared at the Dark Lord, not believing what He had just said.

'I shall teach you.'

I am worthy.

'Come.' He ordered gently.

The young witch stood up with eyes filled with hope. He required her left wrist and, when she did, he placed the tip of his wand onto the pale skin.

'Do you swear to fight for me at any cost?'

'I do.'

'To never betray me?'

The skin under His wand started to tickle and when Bellatrix glanced at it, she saw a mark drawing itself on her forearm.

'I do.'

The mark was growing wider and clearer; a skull and a snake.

'To serve me in order to take power?'

The Dark Mark fully drawn, it started to wave, and in this instant, she could feel a new bound with her Dark Lord, other than the loving look she was giving Him.

'I do.'

And serve Him she did.

I hope you liked this chapter, don't hesitate to comment or ask questions, every critics will be read and taken into consideration for the rest of the story.