digraph {
   compound=true

   Mother [label="Mother of All"]
   Hellhounds
   Leviathan
   Reapers

   subgraph cluster_angels {
      label="Angels"
      Metatron
      Castiel
      subgraph cluster_archangels {
         label="Archangels"
         Lucifer
         Gabriel
         Michael
         Raphael
      }

      Lucifer -> Castiel [ltail=cluster_archangels]
      Michael -> Lucifer
      Castiel -> Metatron
   }
   Leviathan -> Castiel
   Alastair -> Reapers
   subgraph cluster_demons {
      label="Demons"
      Lilith
      Azazel
      Alastair
      Crowley
      subgraph cluster_black {
         label="Black-Eyed Demons"
         Meg
         Ruby
      }

      Lilith -> Azazel
      Lilith -> Alastair
      Crowley -> Meg
      Crowley -> Ruby
      Alastair -> Meg
      Alastair -> Ruby
      Alastair -> Crowley
   }
   Hellhounds -> Meg [lhead=cluster_black]
   subgraph cluster_horsement {
      label="Four Horsemen"
      Death
      War
      Famine
      Pestilence
      Death -> War -> Pestilence -> Famine [style="invis"]
   }
   {rank=same
      God
      Death
   }
   God -> Death
   Death -> God
   God -> Michael [lhead=cluster_archangels]

   Lucifer -> Lilith

   Leviathan -> Mother [style="invis"]
   Famine -> Castiel
   Mother -> Castiel
}