They do make for a menacing group. I'm gonna take your advice and track down the voodoo bonus version of the skullbrain.
You definetly need the rest of the Voodoo series to complete your spell. They'd have to be "aswang vampires" cuz that's garlic bro.
and so hard to get too! I regret not picking this guy up when S7 had them. I've been on the hunt for awhile now..the only thing I've seen recently is someone on ebay has the whole voodoo set for sale but it's out of my price range.