[Molog]

I have a blood fountain with 10 blood. The blood fountain has 4 misc. item slots.

If I give the blood fountain only two two brazen skulls, it gets level 11 blood magic. So far so good.

However if I put an item between the two brazen skulls, it gets level 12 blood magic. I used the pocket knight and pocket lich for this.

Having an empty misc. slot between the two brazen skuls gives you level 11 blood magic.

In conclusion, if there is an different misc. item between two similar misc. items they are probably cumulative. Might also work for creatures with more than 2 hands.