Regn or Reign: How To spell?

The word Regn is misspelled against Reign, a noun meaning "Hence, to be predominant; to prevail."

Word contains consecutive vowels 'EI' in between alphabets r & gn is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  r-e-gn 
Correct Spelling:  r-ei-gn 
Explore spell check of Reign to spell without errors.