Detailed examples of conflicts which feature two non-human factions aren't very common. The story of the Fall of Shadowbrink comes from the 6th edition Tyranids codex and pits Hive Fleet Leviathan versus an alliance of Chaos Daemons. In this episode, we chat about the lore and playing it out on your tabletop with a 4-game narrative.

Desperate Charge Crusade mission:
https://mastersoftheforge.com/on-your-tabletop/desperate-charge