Counter-charm

A counter-charm is a spell that is designed to undo or prevent the effects of a charm, just as a counter-curse undoes or prevents curses.

Known counter-charms

 * The Banishing Charm counters the Summoning Charm
 * Alohomora counters Colloportus
 * An unknown charm counters Anihilare, Dunamis, Emancipare and Liberare
 * Nox counters Lumos