YOU SAID:

I am single handedly the most slayest person i have ever seen

INTO JAPANESE

私は単独でこれまで見た中で最も殺人的な人物です

BACK INTO ENGLISH

I'm the single most murderous person I've ever seen

INTO JAPANESE

私はこれまで見た中で最も殺人的な人間です

BACK INTO ENGLISH

i'm the most murderous person i've ever seen

INTO JAPANESE

私は今まで見た中で最も殺人的な人間です

BACK INTO ENGLISH

i'm the most murderous person i've ever seen