Smithsax, my solution of the inner circle doesn't show all the letters in the correct sequence. Taking the last cell of 18A/5D, you'd think that the 2 letters should be configured so as to be meaningful for each entry. So then, for the purpose of the inner circle, clockwise, you have 'OR.' The next cell also has 2 letters, in this case either might come first. But already the name of the mythical creature is corrupted, since the letters in sequence must be '...OROD...', '...ORDO...', '...ROOD...' or '...RODO...'
However, the letters I have in toto make up the spelling of a mythical creature, if not in the correct sequence.
Candlestick, I think there is only one correct way to highlight, that is an outer 'circle' of 20 cells and an inner 'circle' of 8 cells.