From Longman Dictionary of Contemporary Englishmythic proportionsmythic proportionsvery great size or importance a feat of mythic proportions → mythic
Examples from the Corpus
mythic proportions• a feat of mythic proportions• This is a feat of mythic proportions, comparable to extracting gold from sea water-or helium-3 from the lunar regolith.• By conflating childhood with mythic time - and does not the world possess mythic proportions when we are small? 