Animated dead turn on the caster, and death magic turns back on the caster. Wild mages lose two levels, and no surge is possible. Elemental magic works at double effect for those aligned like the plane, fails for evils and chaotics, and works normally for everyone else. It seems unlikely that spell keys would be able to overcome many of these problems. Wizardly spell keys are material from the plane, bounded by a geometric shape, and symbolic of the desired effect.
Power keys are appropriate to the sect, and last for only a week.
Referees might not want players to realize that they have entered Arcadia. Depending on the site of arrival, visitors might simply recognize the fulfillment of one of our world's dreams of an ideal state. The local clergy are good and happy people, and they will be prove to be effective leaders and proselytizers. Arcadia invites development by the referee, as realms where people obey an internal code which maximizes the happiness of their communities. Religious Right communities without hypocrisy, stupidity, or meanness.