The library for reference.

  Ceremony - held on a dark night every three years to accumulate Evil energy/yin energy from Nefarion so that the evil beings can survive without drastic measures.

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  Nefarion - The evil world

  Umbra Araneus - Shadow spider. An illusionary spider made and given life using Lisa's power. Male is weaker than the female one like in real Araneus.

  Devil - You know who

  Vampire - not the proper term but called by humans.\

  Imprinting - making a mark on another person to give him/her attachment to one's species. Could be used in multiple ways and for various purposes.