At first, Sanguinius did not attach any importance to the loss of his feathers, citing premature molting, but when they began to peel off and come off quite painfully, he realized that something was wrong. Of course, sometimes his feathers were pulled out in battle, but that’s one thing, and when they fall off on their own, it’s something else.

For the first time in her life, the Primarch felt uneasy and truly scared. He was afraid to tell the Father Emperor about this, also considering that he had more pressing problems, but something had to be done about it...

Then Sanguinius decided to go to the only one who can know what it is besides his father and the only one he trusts just as much...