The ability to have the soul of a monster. Variation of Monster Physiology and Other Soul.

Also Called

  • Savage Soul


The user has a soul (or possibly souls) of various forms of monsters with different abilities. The soul of the user may undergo mutation in order to obtain this ability.




  • May lose consciousness.
  • May lose oneself to bestial instincts.

Known Users

  • Aki (Monster Soul)
  • Elfman Strauss (Fairy Tail)
  • Emil Castagnier (Tales of Symphonia: Dawn of A New World)
  • Philuffy Aingram (Undefeated Bahamut Chronicle)
  • Monsters (Undertale)
    • Toriel
    • Sans
    • Papyrus
    • Undyne
    • Alphys
    • Asgore
    • Asriel


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