Total War: WARHAMMER III - Tamurkhan – Thrones of Decay DLC Steam Digital Key is an expansion that introduces Tamurkhan the Lord of the Worms, the new legendary Lord Nurgle. The character can be used in both the "Kingdom of Chaos" campaign and the "Immortal Empire" mode. This is an expansion created for players who want to lead an army of plague, decay and brutal domination.