Yeah, leveling it up is kinda trash. The protection staff alone makes it a super ideal skill to get to a high level, but the only way I’ve found to actually level it up is to camp in the swamps at those places with body and bone piles as my skeletons kill the stuff that spawn there. There’s like 0 way to level it up by just using it a lot as the dead raiser requires at least 2 eitr food which is not something I do on the regular, and I often don’t let things pop my barrier often enough for that to be worth it as well. Hopefully they add some more blood magic staves in ashlands to make leveling it up less of chore