This one's hard but hopefully not frustratingly so ... 2 grid-spanners from well-known, devastatingly powerful poems, lots of Greek mythology, a great neologism from crossword fave Brian Eno (12A12AWord coined by crossword fave Brian Eno to describe the collective intelligence of a group of highly creative people[-------]), and a clue I won't apologize for, no matter how much I should (26A26A"An Olympic ___ist just moved next door to me." "Tell me more, Mr. Frost - do good fencers make good neighbors?"[----])