Please describe the problem you are experiencing and requesting a change for
The graveyard mod allow me to collect blood by killing villagers.
That dont work with mca villagers.

Describe the solution you'd like to see
I can collect blood from mca villagers.

Describe alternatives you've considered
The graveyard mod do the compat change

Additional context
I did a mirror issue : finallion/The-Graveyard-FORGE#102

See mirror issue