Mult-inheritance seminar graphs

digraph G {
  size ="6,3"
  {s [label="Spell"]} -> {si [label="Spell_Instant_Damage"],sc [label="Spell_Cron"]}
  sc -> {sp [label="Spell_Production"],sopu [label="Spell_Once_Per_User"]}
  s -> {"Schatzsuche,Hoellenauge,\nBann,Portalstein,Strike" [shape="hexagon"]}
  sc-> {"Regen,Spinnennetz,\n7_Meilen_Stiefel" [shape="hexagon"]}
  sp -> {"Zauberwald,Steinreich,\nFruchtbaresLand,Erzbaron,\nLoveAndJoy,Duerre,Pest" [shape="hexagon"]}
  si -> {"Komet,\nSteinschlag" [shape="hexagon"]}
  sopu -> {"Erdbeben,\nArmeeDerToten" [shape="hexagon"]}
}