It sounds trite, but I figured out the lava crystal about 30s after I stopped recording. I then smacked myself in the forehead for being such a goober. Thanks for all your help WayofTime; I do appreciate the interest you've taken in making sure my knucklehead self manages to get it right. You're the best!Hey, there!
You have to bind the Lava Crystal to you, similar to the blood orbs. Also, if you right-click on the Altar with the Divination Sigil it will tell you how much LP is in it - right-clicking with the sigil alone will tell how much your Soul Network contains, which is a different thing entirely.
To learn more, make sure to visit my thread! http://www.minecraftforum.net/topic/1899223-164-162-blood-magic-v065b-updated-dec-06-2013/