A frozen world.
A band of trapped colonists.
And an ancient alien structure under which something stirs.
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.
Ymir’s Crown is an IOUN STAR adventure for 3–5 Jeddan Knights of levels 1–3.
This is a companion discussion topic for the original entry at https://rpg-trader.com/products/9021/ymir-s-crown-an-ioun-star-mission