na-adjective
legendary; fantastical; romantic
Describes something with the quality of a legend or fantastic tale; often used for stories, settings, or atmospheres that feel larger-than-life or mythic.
この映画は伝奇的な雰囲気に満ちている。
This movie is full of a legendary atmosphere.
彼の冒険談は伝奇的で、まるで物語
His adventure stories are fantastical, just like a tale.
From 伝奇 (romance, legend) + 的 (-like, -ish). The exact historical derivation of 伝奇 is uncertain, but it is conventionally associated with legendary or fantastical tales.