A routine rescue mission on the frozen world of Ymir-5 quickly becomes a fight for survival when the Jeddan Knights encounter missing colonists, undead voidthralls, and someone actively working to unleash whatever was locked under Ymir's Crown.
This is a companion discussion topic for the original entry at https://rpg-trader.com/products/9021/ymir-s-crown-an-ioun-star-mission-for-3-to-5-jeddan-knights-of-levels-1-3