The [Hall of Bells]. It was one of the three most powerful Spells of the Hall of Ice and Fire—a simultaneous defensive, attack, and area-control Spell.
It took advantage of the structure of Ice Mana, using it to trap and siphon away energy. When cast in front of an attack, it was especially good at absorbing and dispelling impact. However, when it was cast around a person, it could sap away their energy, drill chill into their bones, and crush their ability to counter.
It was a devastatingly effective Spell—one only a handful of disciples could cast—and one that should have been impossible to escape should you face its latter version.
And yet Theron had. In fact, one would have never guessed that this was one of the Hall of Ice and Heart's three staple Spells.