cadarnle
Cadarnle is a sixth level abjuration with a ten-minute casting time, a duration of twenty-four hours, and a list of material requirements, which include burning incense, brimstone, oil, blood, and silver.
Cadarnle is used to make a house or small building into a stronghold. Outer locks are magically secured, windows and doors are covered with an illusion to make them appear as plain sections of wall. If someone can enter, another illusion makes the interior heavily obscured with thick fog. The magnetic field inside is scrambled, confusing any sense of direction. For an intruder, the floor becomes highly adhesive, making walking nearly impossible.
In 2010, the Prince of Wales made a stir when he invited members of the press to Highgrove, his home in Gloucesershire. He spoke of his extensive training of cadarnle and how, at any time, he has enough provisions to last a fortnight. In 2004, he made similar statements about his London residence. But the royal does not rely on magic alone. The home also has a steel-reinforced safe area with a telephone with a direct link to royal protection police stationed elsewhere in the building.
Here in the United States citizens can use cadarnle freely. If, however, the spell is used during the commission of a crime, the penalty is a felony.