Does anyone know how to get rid of Corruption by the book?

AFAIK - no, in BC. But you can use rules from the DH1 Ascension (p.12)

The Black Crusade game master's kit includes a significant expansion to burning Infamy for more than just survival-one of the options allows you to sacrifce Infamy to reduce Corruption. You can reduce Corruption by 2 for each point of Infamy sacrificed via the False Repentance rule, or buy off Corruption points at 1 per 250 XP spent via the Ritual of Castigation.

On another tack, you can also craft a Simulacrum Effigy, acquired as a Very Rare item: that absorbs 1/2 rounding down of all external Corruption points gained with a Hard Willpower test, like from a warp rift or Sorcery exposure. However, it can break and flush you with the accumulated Corruption on a roll of 95-100, so the first 2 options are generally preferable.

On 8/1/2018 at 8:36 PM, Jargal said:

AFAIK - no, in BC. But you can use rules from the DH1 Ascension (p.12)

Still can't do that. Can you give more details how?

11 hours ago, DeonTey said:

Still can't do that. Can you give more details how?

DH1 Ascension, p. 12. In short, you can remove corruption by spending XP (100/50 xp per point), by sacrificing characteristics (2 point of characteristics remove 1d10 Ins/Corr) or by trading Corruption for Insanity (or vice versa).

And check Black Crusade Game Master's kit, p.30: Ritual of Castigation (250 xp per 1 Corruption), False Repentance (1 Infamy = -2 Corruption)