>>44341248>>the Orks and Tau aren't much affected by it
Tau and Orks are resistant to its mental corruption of Chaos due their upbringing and mentality but they are not immune to it.
Orks have fallen to Chaos corruption before. Anyone who tells you otherwise is stupid or an Orkfag (usually it's one and the same). Tau when exposed to Chaos, suffer distress and mental pressure that translates into increased aggression. Fire Warrior Kais was temporarily corrupted by Chaos. >the Necrons and Tyranids aren't affected at all
No case for Necrons yet because there is not enough Chaos vs Necrons lore. There is no detailed accounts of Necrons vs Chaos.
As for the Nids? Tyranids are vulnerable to the madness and physical corruption of Chaos. The Hivemind removes the affected Tyranids as if they are cancers.>>the Eldars are so disciplined they don't fall much either these days
Chaos Eldar appear in the fluff from time to time. For example, the Tzeentchian warlock in the Dark Eldar path series.