Race Name:
The argument can be made if Sezka is still human today however at birth he was so thats what he is classified as.
being around the magic he weaves and studies for ao long has given his body inhuman looks such as deathly pale skin thats stain black in places by eldlich magic.
Magic markings/ Tattoos cover his body from head to toe.
he covers up most of hid body in layers of clothes as if hiding from something. his body lacks any hair of anyhind even lacking eyelashes.

Physical Apperance

• Ability Score:
  All your ability scores increase by 1

• Lifespan:
  Humans reach adulthood in their late teens and live less than a century

• Alignment:
  Humans tend toward no particular alignment. The best and the worst are found among them

• Size:
  Humans vary widely in height and build, from barely 5 feet to well over 6 feet tall. Regardless of your position in that range, your size is Medium

• Speed:
  Your base walking speed is 30 feet.

• Languages:
  You can speak, read, and write Common and one extra language of your choice. Humans typically learn the languages of other peoples they deal with, including obscure dialects. They are fond of sprinkling their speech with words borrowed from other tongues: Orc curses, Elvish musical expressions, Dwarvish military phrases, and so on.

• Feat: Martial Adept
  
• You have martial training that allows you to perform special combat maneuvers. You gain the following benefits.
  • You learn two maneuvers of your choice from among those available to the Battle Master archetype in the fighter class. If a maneuver you use requires your target to make a saving throw to resist the maneuver's effects, the saving throw DC equals 8 + your proficiency bonus + your Strength or Dexterity modifier (your choice).
  • You gain one superiority die, which is a d8 (this die is added to any superiority dice you have from another source). This die is used to fuel your maneuvers. A superiority die is expended when you use it. You regain your expended superiority dice when you finish a short or long rest.