My first massacre in a new world(gore warning)

Ava(one of the elven slaves) POV: it had been nearly two months since these stupid humans had captured me and several other elves from the forests of Yggdrasil. These months were absolute hell and our dignity was constantly being stepped on by these grubby and fat human merchants. As we were "precious" merchandise they wouldn't force themselves on us because they couldn't sell damaged goods but that didn't stop them from beating us whenever something didn't go their way. Today was one such unlucky day we'd been moving for almost two days straight and there were so many of us slaves they couldn't fit us all in the slave cages so many had to walk. My little sister was one of them. After walking for nearly two days straight her 6 year old body could no longer keep up and she collapsed. That was the last straw for the slavers as after having been harassed most of yesterday by a pack of wolf type mana beasts the merchants took their frustrations out on her. For 5 minutes straight those bastards hit her until her body was so swollen I could hardly recognise her. I wanted nothing more than to break out of here and kill those merchants even if it cost me my life but I couldn't. Even harbouring thoughts of harming their master causes the slave collar around all our necks to send a massive electrical shock through our bodies. As such as soon as he beat my sister my collar started sending out massive amounts of electricity all but giving away how much I wanted to kill him. Despite it being the night of a new moon and as such incredibly dark camp has been set up with a couple mana lights near the center of the campsite with the rest being illuminated by a few regular torches placed here and there. The man who had been beating me sister turned around and looked at me while breathing heavily. He was a fat human and an extremely ugly one as well. As soon as he saw me glaring at him he laughed and said, "oh look boys the little doggie is baring her fangs!" Right after he said that his expression did a 180 and he looked very angry as he said, "why don't you teach our new doggy how to behave with her masters!"

As the men pulled em out of the cage and started hitting me I could only mouth the words, "I'm sorry to my sister." However I noticed she wasn't looking at me she was looking up the hill and her eyes were glowing faintly. While humans had issues seeing in the dark we elves grew up in dark forest so we could see very easily. We also had another ability that humans lusted for, the ability to see mana which allowed us to navigate the mana rich forests and avoid powerful monsters. When I activated those eyes I could see that on top of the hill to my left was what looked like a human child who had his arm raised and behind him I could see 2 massive suits of armor that were each holding some kind of massive wand. I knew they weren't all that were up there I could sense others but the beating I was getting was making it hard to focus so as the slaver spit expletives at me I saw the child drop his hand and the night sky lit up like the gods themselves were passing judgement on all below. It wasn't just that hill either the one to my right was launching some kind of rapid fire spells as well. The merchants were surprised for the first second but when they saw how fast the spells where coming they didn't seem to be very worried they even told the leader of their guards to send one squad to deal with the amateur mages who though quantity could overwhelm the ki and mana barriers of the guards. That all changed when four of the red lines hit one of the guards beating me. The first two caused massive cracks to form in his ki barrier, the third spell broke it and the fourth blew a hole through his head. At that moment a much deeper sound came from one of the massive suits of armor as it shot its spells at the soldiers. It didn't matter if they were a mage or a soldier one shot killed them before they even realised what happened. Luckily for the defenders there only seemed to be 4 of these so they weren't able to wipe them out as quickly as if there were more. As soon as the slavers and their guards started taking cover and calling out orders another surprise attack was carried out. One of the members of the B-rank adventurers team that were the strongest guards of the caravan was grabbed from behind, a hand covered his mouth preventing him from even screaming before a dagger came down and cut his throat out, after his throat was cut the assailant stabbed the man in his heart and brain before throwing the body under one of the slave carriages sheathing his dagger and casting an illusion spell around himself to look exactly like the man he killed. The whole assassination took less that 5 seconds so by the time the other three turned around it was like nothing had happened. "Is everything all right Micheal?"The leader yelled at the camouflaged assailant. The assailant not having replicated the mans speech patterns nearly nodded with a look of fake concentration on his face as he pretended to maintain the barrier. As soon as the leader turned back around the assailant spoke in a voice befitting that of a child, "Michael's dead I ripped his throat out."

As soon as he heard this the leader tried to turn around but before he could even try to slash at the assailant a odd contraption ava had never seen before was pressed against the leaders forehead. All the assailant said was, "bang" as his finger contracted and the man fell to the ground lack a sack of stones with a hole in the middle of his forehead. The other two didn't even have the time to try and plead for their lives as one of the massive armoured men had charged the caravans defensive line and broken through without any difficulty. With only one mage and one fighter left the two knew they were dead and as the massive man in black armor rammed through the other guards like a battering ram the swordsmen tried to stop his momentum but was pushed back as soon as their swords crossed. The two fighters were obviously mismatched with one being in the middle of rank B and the other only having the individual strength of a rank Middle C. But still Ava could only watch as these two powerhouses collided together in an incredible show of fighting spirit. The armoured man was two and a half feet taller and was both strong and fast while the slavers swordsman focused entirely on speed. As the fight started the person who had killed the first mage had already ripped the other mages spine out and thrown it across the caravan to impale one of the slavers who was trying to escape to the side of the carriage. Ana could only try not to throw up while the infiltrator didn't even seem that bothered by it.

Leonidas POV: My soldiers had already taken care of most of the guards and had surrounded the area to make sure none could escape so now I was just waiting for my protector to finish his fight against this swordsman. As much as I hate to admit it I would've been dead if I'd fought that guy head in which is way assassinated those other three first so they wouldn't interfere in this fight. I had wanted to see what my protectors were capable of for a while now and this was the perfect opportunity. I had already called for medical support from our base as soon as most of the fighting stopped and I could feel a couple of portals opening up around me as the only 10 medics in our base came out each guarded by 4 protectors as 10 guardsman. As soon as I turned back to the fight I saw the slaver fighter go for a feint to the protectors left and when the protector fell for it and moved his sword to parry the mans rapier the slaver pulled it back and wen the to stab him in a vulnerable joint area in his armor. When the protector sensed this he used his free hand to cause an explosion that blew him out of the way of the swords path and severely injured the already wounded man. Falling to his knees the slaver threw his sword to the side and looked at me while he begged for his life. I turned and looked at all the slaves around me who were looking at the man with hate and a raw bloodlust that said all I needed to know. I pointed my thumb into the air to give the man some hope then a second after crushed said hope by ordering the protecter to end his miserable life. At that moment I felt two pairs of eyes in me, looking around I met the eyes of one of the elven slaves. Her eyes had a slight glow and I knew she was trying to see the mana around me to find out what I was. Unfortunately for her I already knew how to conceal my aura, but I released just a tiny amount of my aura to show her how many leagues apart in power we were. I ignored her after that and went to a little elven girl who had been the one to scream and alert me to the caravans presence. She was barely still alive, using my light magic I was able to see her ribs were broken and puncturing her lungs, her leg was broken and she had at least two fractures on her arms. I realised she would die soon if I did something so I immediately called a medic over who began using holy magic to repair her body as much as possible. After walking around and helping my soldiers get the slave collars off I realised I probably only had an hour left before my sister and everyone else in the manor woke up and started looking for me. I immediately used my flash step skill to teleport onto the roof of one of the carriages that had survived our attack in mostly one piece. After all the slaves realised there was someone standing above them they stopped talking and looked up.

Ava's POV: When I saw the men who had rescued and healed us snap to attention before saluting at one of the carriages I pulled my sister close and prepared to use some of my spells to defend us if need be. I couldn't tell what species these armoured men were but the shadow looked to be human so it wasn't impossible for him to rescue us just to turn around and sell us off as slaves. As the shadow looked around the darkness around him started to disappear and in his place was a small human child who couldn't have been any older the my little sister. I'd seen him use illusions before so I scoffed at his stupidity thinking we would let our guards down around a human child it didn't even make sense for a child to be here in the first place. As he looked around he locked eyes with me and for just a second I felt an overwhelming aura force me to my knees but it was gone as fast as it came. If it wasn't for everyone around me looking at me in shock I would have thought it was a figment of my imagination. As he looked around he seemed to be talking to himself before a portal appeared behind him. With my elemental vision active I could see that spatial mana particles were rampaging around the portal as of who ever had cast the spell had ripped space apart instead of working with the spirits that controlled space to create it. The human turned around to face us and gave us a child's smile that seemed to be full of innocence and glee, had we all not seen him take down 3/4ths of a b ranked team we might have believed that and gone along with him but we all knew how dangerous he was. Turning back around to one of the armoured men near I barely heard him whisper, "take them back to base you have full authorisation to use the medbay. Just make sure none of them leave till I'm back from the princess party, I'll have a more in-depth talk to see if I can recruit them after I'm back. They're security clearance is level zero get them ID's but they aren't allowed to see,ask or help with any projects unless them want to swear an oath of absolute loyalty to me. If they swear the oath they get level one security clearance and are to be sent to the engineers quarters to receive the blessing. Also Contact one of the phantoms in the base and have project alpha brought out so I can show the dwarves what we need their help with. Dwarfs are a curios species if they see what we're working on they'll want to join just so they can learn what it is and how to make it. I've got the core so project alpha will be coming with my to the capital as a bodyguard."

Sergeant as I'm guessing his name is only clenched his fist over his heart and bowed from his waist as the human child turned around and walked through the portal. Sergeant turned around and gestured towards the portal and the men with red crosses on their shoulders and backs started moving those who were very injured through the portal. It was only after watching for a couple minutes that I realised my sister had already been taken through. Cursing my negligence I ran through to make sure she was okay. As soon as I made it through I started looking for her but I couldn't help but stare in shock as all around me was a giant cavern. Everywhere I looked there where more armoured men like sergeant and more of the smaller armoured men who seemed to be marching in formation. As a princess of the elves I had been to the dwarves underground cities before so this shouldn't have surprised me but the sheer amount of mana arts and spell formations imbedded everywhere made this place a stronghold like no other. Teleportation was restricted to the two pillars I'd just come out from and the walls we imbued with the 5th tier earth spell Harden which made them incredibly difficult to destroy. Reminding my self what I was here for I found my sister being carried on some kind of fabric Hammock between two of the soldiers that had saved us. As I ran towards them I was stopped by a a beastwomen in a maid outfit. Despite being a cat type she seemed to be very strong I'd guess around B rank but that wouldn't be enough to stop me. Starting to gather my mana to push her out of the way I gave her one warning, "I don't want to harm you get out of my way or I will."

As soon as I said that I sensed an immense amount of danger from the walls and the earth mana I'd gathered around me started to dissipate as formations on the walls started glowing and sucking in my mana.

The beast women looked at me and said, "this is a restricted area you only have lvl zero clearance leave now and I'll stop the mana draining formation continue to try and struggle after the lord saved you and I'll execute you myself. Don't even think of trying to use spells to get you out of this only those who have sworn an oath and have a sigil are able to use mana in the base."

Realising my defeat and just how thorough the defences of this cavern were I could only fall to the ground as I watched the men reach the building and take my sister inside. After the maid realised I'd given up my mana stopped draining and she threw me over her shoulder before taking me towards a castle like building in the center of the cavern. There I was shown to a room that was nothing like the royal elegance I'd grown up with and seemed to be meant only for sleeping and basic needs. All there was was a bed, sink a small protuberance coming from the wall that used a formation to draw water so the occupant could wash their body and a small closet for clothes. Falling into the bed I started to cry as I thought about what might happen to us the next day.