Add a New Dynastic rule to the Ruleset and call it “Circle of Protection” and have it read as follows:

Each Apprentice has a Circle of Protection surrounding their Workbench. This Circle of Protection must be activated by a Spell in reference to Rule 2.5. Each Circle has a corresponding Spell, in which no two Spells can have the same Rune Sequence, each with unique Effects. As a weekly action, each Apprentice may activate a Circle of Protection by casting it’s corresponding Rune Sequence. In addition, each Apprentice may only have one Circle active. Once an Apprentice activates his or her Circle, that Circle lasts until the end of the week. After that week, Each Apprentice has a chance to activate a new Circle of Protection. There exists a column in the GNDT entitled “Circle” which tracks each Apprentice’s Circle.