Sleon or Slain: How To spell?

The word Sleon is misspelled against Slain, which is past perfect of "Slay"

Word contains consecutive vowels 'AI' in between alphabets sl & n is misspelled as 'EO'
Wrong Spelling: sl-eo-n
Correct Spelling: sl-ai-n
Find more incorrect spellings of Slain to spell right way.