Kol's POV
After running away from Kol decided to travel the world to learn more about magic to see if he could use it again or if it was a fluke after he first became a vampire he remebers how he did it and what it felt like but so far he's only been able to do small stuff like float a leaf or light a campfire after hours of trying he keeps practicing he doesn't want his new powers to disappear so he keeps seeing what his limits are even though he's undead he seems to be able to feel the energy in nature when he is using magic he just hopes he's not limited to this.
Years of traveling and talking with witches haven't done much for his powers but it has given him knowledge that he hasn't had before he tries different types of magic in the hopes of becoming the strongest magic caster who ever lived the only magic he stays away from is spirit/ ancestral magic as he thinks that they would have a bad effect on his magic or try to take it for themselves despite numerous offerings of power and knowledge he knows better than to give into temptation as they only care about their own power.
Centuries pass he tries to stay away from his siblings but he unfortunately runs into his father in Greece who is pursuing Niklaus Kol gets his attention who stops then sees Kol greets him then gets a wicked idea in his head before anything can happen he grabs Kol's head looks deep into his eyes speaks in a demonic voice that's hypnotic and he listens to every word as if it were coming from a god or goddess "you and your siblings hate Niklaus so much that you fear him and with that fear comes the knowledge that he might hurt you so in order to prevent that from happening you all must hurt him first and torture him for 1,000 years then let him go" after that Mikael says you will remember this until the day you die not that you were tricked but that you've always hated him just didn't realize how much until now.
Mikael leaves to find the other siblings he finds them and does the same to them he even erases every good memory that was shared between them they all track Niklaus down in Athens he's at the monument of Athena when his siblings surround him they knock him out before he can do anything tie him up in vervain ropes then take him to the black forest there they string him up take off his clothes leaving his underwear on when he wakes up he doesn't even ask he just sees the hypnosis and hatred in their eyes.
Once every 100 years each sibling would take turns beating him but not in the face whipping him burning him cutting him stabbing him stretching his limbs drowning him freezing him making him bear the weather in nothing but underwear also they would poison him with anything they could get their hands on they would club him stone him stab him in the heart in other organs other than some discomfort he would heal even cuuting off a limb other than the head would grow back they did everything that they could to break him nothing was working except they saw a glimmer of hope in his eyes one day.
Rebekah asks him why do you keep smiling through all of this Niklaus says because i know something that you all do not as i've been inside your heads as much as you all have tried to invade mine so i know what happened Rebekah asks and what do you think happened he says open your mind to me and i'll show you she does and he shows her what Mikael did instead of getting sad or angry she smirks in satisifaction at finally getting past his mental defenses he frowns then sees that she already knows also sees that they showed each other what happened.
They also used Rebekah as they know that of all of the siblings Niklaus protected her out of all of them he sighs then asks are you sure that you four and father want to go down this path because if you do open the door you're about to open inside my head you won't like what comes out of it Rebekah says you don't scare me father does Niklaus laughs for the first time since he was a kid surpising Rebekah as she can barely remembering him laughing at all do to his horrible childhood while she was always protected by him and everyone else.
He says i've been nice Rebekah i've taught you guys how to survive how not to alert humans that we exist how to defend yourself and i've even kept father off of your backs for centuries so tell me in what way am i this great eveil that you all see me as Rebekah couldn't argue with him he says i even took the fall for every single one of my siblings punishments including yours so tell me what evil deeds other than killing our mother have i committed the siblings answer killing our mother and getting Heinrick killed.
Niklaus scowls and says i was 6 years old he was 10 he should have known better than to listen to me or to follow me when i was curious about our neighbors the fact that they were werewolves is irrelevent because it happened in broad daylight how was i supposed to know that germans and vikings hated each other at such a young age as for mother's death i wasn't the only one who wanted her dead they say no but we could have worked through it if not for you.
They invade his mind and torture both his mind and body for centuries until his rage and darkness are about to take over what they thought would weaken him and break him has done the opposite Rebekah sees inside his mind and sees that it's his humanity that is now locked bedhind the door and the monster that is roaming his mind she gets kicked out of his head then runs as far away as she can in fear for her life his siblings do the same but because he's starting to break out of his restraints.
Niklaus's scars become forever burned into his body after that he went on a killing spree across every battlefield he could find across the ages until he was put asleep in 500AD by a group of vampires after that he was never seen or heard from again Kol however went through the ages learning practing studying and teaching magic to every witch and magic caster he came across he even helped make the very first dark object he also helped invent alchemy.
Alchemy was where he was the most powerful aside from nature magic the other types were fun to learn for a little while but he felt wrong learning sacrificial magic he kept travelling around the world learning different types of magic he also taught them magic including how to make dark objects Kol evenutally got word of a cult who worshipped Silas he also learned about the brotherhood of the five Kol kept away from both of these things as much as possible though he made sure that he stayed informed of how many there were what they were upto and how dangerous they were.
Kol also heard tales of a supernatural vampire hunter that supposedly can't be killed by the name of Rayna Cruze he also made sure to stay far away from her and to avoid doing anything but use magic when she was around that way she would think that he was just a warlock she bought it he always made sure to behave around her despite him finding her attractive he knew better than to get involved with her as eventually she would ask why he wasn't getting any older.
The last thing Kol heard about before heading back to France to meet back up with his siblings is the sun and moon curse of the vampires and werewolves and how it supposedly is older than even the originals themselves he eventually found a copy of it the curse states :
werewolves can only transform on a full moon and the vampires are weakened by the sun making the werewolves servants to the moon and the vampires slaves to the sun
Kol found the curse to be interesting as he delved into it apparently there's hundreds of cultures and myths about it even some local legends mention it vaguely he wonders why he's never heard about this until now he spends the next 2,000 years studying everything to do with the supernatural he got so caught up that he forgot to meet up with his siblings when he's finished with his studies it's the year 1492 Kol just spends the rest of his time with his family.