- Country: South Korea
- Genres: Action, Fantasy, Horror
- Release: 2018-09-12
- Director: Jong-ho Huh
- Writers: Jeong-uk Byeon , Heo-dam , Jong-ho Huh
- Language: Korean
- Stars: Myung-Min Kim , Kim In-kwon , Lee Hye-ri , Choi Woo-shik , Park Sung-woong , Hee-soon Park , Lee Kyung-young , Kyu-bok Lee , Byeong-hee Yoon , Chi-yeong Shin
- Runtime: 105 min
- Awards: 1 win
- AKA: 物怪 (Taiwan) , Jakseoui Byeon , Mulgoe (Brazil) , Monstrum (United States of America) , ムルゲ 王朝の怪物 (Japan) , Monstrum (Singapore) , Jakseoui Byeon: Attack of Strange Object (Korea) , Monstrum , Mulgwoe (Korea) , Monstrum (Spain) , Săn Lùng Quái Thú (Vietnam) , Mulgoe , Monstrum (Portugal, Portuguese Republic) , The Accident: Attack of the Monstrous Thing (Korea) , Moolgwoe (Korea) , Монструм (Russian Federation) , Monstrum (Poland) , Monstrum (United Kingdom) , Jakseoui Byeon (Korea) , Jakseoui Byeon: Attack of the Water Monster (Korea) , Monstrum (France, French Republic) , Monstrum (Italy) , Jakseoui Byeon: Moolgwoeui seubgyeok (Korea) , Mulgoe (Mexico) , Monstrum (Germany) , Mulgoe (Korea) , A szörnyeteg (Hungary)Jakseoui Byeon, 灼鼠之变:物怪的袭击 (China), 작서의 변 : 물괴의 습격 (South Korea)
- Plot:
Ancient Korea, 1506. The tyrannical King Yeonsan-gun of Joseon is overthrown by his half-brother Jung-jong, whose reign begins with a blood bath. Over the years, traitors plot against him, sinking the kingdom into chaos. In 1528, frightened rumors come to royal palace, regarding a mysterious creature, known as Monstrum by the peasants.
- IMDB:tt4374286
Monstrum Cast · · · ALL
Jong-ho Huh
Director
Myung-Min Kim
Yun-gyeom
Kim In-kwon
Seong-han / Mulgoe (voice)
Lee Hye-ri
Myeong-i
Choi Woo-shik
Royal Court Officer Heo
Lee Kyung-young
Sim-un
Hee-soon Park
King Jung-jong
Park Sung-woong
Jin-yong
Do-gyung Lee
Grandpa Song
Kyu-bok Lee
Mo-gae
Won-hee Cho
Second Vice-Premier
Joo Ye-rim
Young Myung
Taeyoung Kang
In Duk
Byeong-hee Yoon
Eunuch
Kim Gyu-baek
Peddler
Min Suk Kim