counterspell

counter- +‎ spell

counterspell (plural counterspells)

1. A magic spell that reverses the effects of some other previous spell.
   • 1936, Rollo Ahmed, The Black Art, London: Long, page 22:

     The simplest action was fraught with danger, and could only be accomplished with the aid of talismans and counter-spells[.]

counterspell (third-person singular simple present counterspells, present participle counterspelling, simple past and past participle counterspelled)

1. (transitive) To cast a counterspell against.