Undying Corruption: Core Rulebook

by Minki Kim

"Reclaim the light or let the rot consume you… A 5e lvl 1-20 campaign across Korean mythology Scheming nobles wake the restless dead, besieging innocents. Welcome to Danguk, a land inspired by Korean history and mythology where mortal heroes can ascend to divinity. You are a mudang, a spiritually sensitive being that seeks to maintain harmony between the material and spiritual worlds. What begins as an ordinary request to exorcize a wraith will uncover a conspiracy that threatens to consume the lands in a deluge of malice. Trek across a Korea-inspired setting as written by Koreans, meet never before seen creatures found in folklore, befriend allies in arms, and face off against bosses each with unique strategies. You will discover your true potential and become as gods. Undying Corruption takes you from level 1-20 as you ascend toward divinity. Includes the     12 new subclasses, one for each core class     1 new mounted commander the Tactician     6 new races based on aspects of Korean culture     50+ original monsters from Korean mythology     20+ maps with dungeons set in different parts of a Korea-inspired setting     Many more original villains and big bads with creative combat gimmicks     Illustrations created by 30 skilled artists from different industries" 

504 pages, Hardcover

Published May 1, 2026