So far tried it with picks and axe. And chance of getting blood with pick or axe extremely low even from dragons.
Killed around 10 bat demons and 2 dragons, and got blood drop only once from one of bat demons.
Is there tool that provides higher chance of getting demon blood?
I want to say that I’ve had fairly good luck with a skinning knife since that is my primary means of harvesting creatures other than a special few such as rocknose, but I am also lazy. I came out of the breeding pits last time with quite a few demon blood and only had my hardened steel skinning knife and cleaver with me at the time.