Arc 15The Mirror Soldiers
Lin Fan and the Imperium shifted their campaign against the T'au as the Fourth Expansion’s Warp experiments produced a Greater Good god and the Ethereals deployed Reflection Warriors. The T'au counteroffensive targeted Cain, and the arc ended with Imperial troops fighting the Mirror Soldiers around a black sphere.
- Lin Fan’s forces destroyed the T’au power district and trapped Shadowsun’s fleet, while a dozen T’au ships escaped through an experimental Warp rift and encountered the Greater Good God.
- The Greater Good God announced Aun'Va’s death, and the Emperor and the God-Emperor revealed they had shaped the deity to guide the T’au toward an alliance with the Imperium.
- Lin Fan shared his plan to force the T’au toward peace, while Imperial leaders revised their campaign after prophecies warned of a coming Tyranid attack.
- Corvin Sevraks and the Raven Guard sabotaged T’au gun emplacements, and Sage Kaos cleared Mugula Gulf’s radiation storm so the Imperium could land its forces.
- Aun'Va introduced the Reflection Warriors, and Director Yongtan secretly used captured Raven Guard gene-seed and T’au traits in his experiments to create more of them.
- Shadowsun ordered a counteroffensive aimed at the 37th Regiment and Cain, but Lin Fan fought off T’au battlesuits as Kor'sarro Khan engaged Shadowsun and shadow warriors appeared.
- Rebecca discovered that the Reflection Warriors contained bound creatures, while Delia’s mechanical dog revealed a black sphere and Mirror Soldiers collecting fallen troops.
- Cain deployed Kastin and Selina’s forces against the Mirror Soldiers, and he struggled against one until Jurgen’s sniper round struck its helmet.