The sisters were crouching in a forested area. The snow lay thick around them and crunched lightly under their feet.
It seemed to be empty and quiet, but Emma trusted her big sister.
While Emily was missing a third-rankers omnisense, or a Runebound's supernatural senses, she had something similar: her mind control spell.
Originally nothing more than its name suggested, Emily had unlocked an improvement to her second-rank darkness spell: primer aura. As Arcanists or Runebounds progress in their journey, they often discover enhancements to their existing abilities by continuing to explore the sigils or runes associated with those abilities.
Thus, primer aura was not a new spell, but an improvement on her existing spell.