I need it for the outcast quest and where should I look for this? I already did a quest for key and other uses for the blood now I need more.
The best way is to farm ch’tonic bosses and locked chests (you need dynamite to open chests).
There is also a small side quest which you can do on every difficulty that gives BoC as a reward: http://grimdawn.wikia.com/wiki/Trapped_and_Alone
Fixed your link.
FYI https://grimdawn.gamepedia.com/ is the wiki that actually gets updated these days. wikia as a company is absolute trash and they have a ton of malware-infected ads/pages.
Aw thanks, didn’t even know about that one, it even looks better, bookmarked thx.