Samguk yusa 三國遺事 (Memorabilia of the Three Kingdoms), compiled by Iryŏn 一然 (1206–1289), a prominent Buddhist monk in Koryŏ, stands as one of Korea’s most valued historical classics. This classic weaves together a collection of captivating and unconventional narratives—marked by their peculiarity, miracles, and wonder—diverging from the usual societal norms. Unlike traditional historical chronicles such as Samguk sagi 三國史記 (Histories of the Three Kingdoms), Samguk yusa presents a diverse mosaic woven with historical anecdotes, legends, and folklore, especially emphasizing connections to Buddhism. The tales of miraculous events hold historical significance, serving as reflective mirrors that not only shaped the beliefs of pre-modern Korean Buddhists but also influenced the wider population of that era in Korea. This paper delves into the cultural significance and societal roles of miracles and wonders within pre-modern Korean society, particularly through a thorough exploration of narratives and accounts within the Samguk yusa. Through these miraculous stories, the Samguk yusa not only validates the spiritual power of Buddhism but also redefines concepts like filial piety and national protection by integrating them into the Buddhist framework. This ensured Buddhism’s enduring significance in Silla society and reinforced the importance of the supernatural as an integral part of a holistic view of history and culture.