noun
spirit power; magical power
Refers to supernatural or magical energy, often associated with yōkai, spirits, or mystical beings in fantasy contexts.
その妖狐は強大な妖力を持っている。
That demon fox possesses immense spirit power.
妖力を封じる結界が張られた。
A barrier was set up to seal the magical power.
Compound of 妖 (yō, 'bewitching, spirit') and 力 (ryoku, 'power'). The exact historical derivation is uncertain, but the term is used in modern fantasy and folklore contexts.