
I like this story, I love the MC, but she rage fire ghost thingy is really annoying and I don't understand why they make his mother look like a stupid fool... Yes, she lost her core, but she was a warrior in the past, she should still have sword abilities and still work on her bodies muscles, like the hell, why do they make her seem some sheltered lady that never has even fought...

I think you meant that without a core you're but a regular human? Because she doesn't even have the characterists of a swordsman... But yeah it makes no sense, it's like she doesn't even have knowledge, where did her brain go? She should be able to help her son with her knowledge and she should be able to understand how strong her son is instead of being a little lady just being "kyahhhh, my son's so stronggg, how did this happen"... Does she not have eyes?

she should still have the muscle memory and the techniques are basically ingrained in your mind, also Lumer also lost hi senergy core but he still teaches right? Since she was such a great prospective swordsman she would be a brilliant personal trainer for Raon, and I thought since she knew Balder's techniques best she would coach him to suit his battle style

She was weak willed since the beginning her 1rst strong action was to leave then to come back....and the last time she hold a sword and used martial arts she was unable to defend her husbanf and daughter....welcome to trauma land....spoiler :
but later she'll be ablr to fight back to defend her house and maids....( anf have her core back)....

Empty Mama, seriously? I hate these stupid demon scans............

In the original it is written as 빈 마마 = "bin mama". If you translate it just like that it means "empty mama".
But in the Joseon Dynasty they didn't use the name of each person but Styles or Titels (King, Queen, Crown Prince, ...) with this they could differentiate the rank. "bin" (빈) is such a title and simply means Concubine, "mama" (마마) means mother, so the right translation would be "concubine mother"
They call them mother bc the rightful Queen of the King is the mother of the whole nation and the Concubines should also devote themselves to the nation.
I hope I could be of help a little bit ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄
Demon daddy looks so good today(づ ̄ ³ ̄)づ