Your character’s ability scores, increase dexterity score by 2 and intelligence by 1. None of these increases can raise a score above 20.

"Skill for aiming and quick reflexes, intelligence for technical understanding."

“You can create improvised weapons and explosives. Once per long rest, you can create a small explosiv weapon that you are able to throw 10 ft. it deals 2d6 fire damage in a 10 ft. radius scale with level 6 [3d6], 11 [4d6], 16 [5d6]. Enemies must pass a Dexterity saving throw against your spell saving throw DC to halve the damage.”

Just before you get damaged, you can add your Dexterity modifier to your Armor Class in response as an reaction until your next turn begins. You can use this ability once per long rest.

You have Darkvision with a range of 60 feet.

"You are used to living in chaos and darkness. You can see up to 60 feet (18 meters) in dim light as if it were bright, and in complete darkness as if it were dim light.”

You can experiment with explosives in a chaotic way. Your improvisations make explosive weapons more dangerous. When you deal fire damage, you can add your Intelligence modifier to the damage once per round.

Your character knows at least two languages: Common plus one languages you choose from the Standard Languages table. Knowledge of a language means your character can communicate in it, read it, and write it.