Hide Object

[Avalon]

Some "Item" descriptions use different wording. Does every enchanted item have either to be powered by the user, a dedicated powerstone, or by the Power enchantment. Hide object for example says, "(b) Any object may be enchanted to “disappear” and “reappear” at its owner’s command. Energy cost to enchant: 100 per pound of item weight." The wording seems to hint at the possibility that the item is Always On by default and the user has only to state the command to use it. Does the user have to also spend FP if the item is otherwise not self-powered, or does the item even have to be further powered such as with the Power enchantment?

Or consider a fairly "low level" effect in Walk on Water (lower level in that it doesn't doesn't inherently maul physical laws to the degree that Hide Object does): "Staff, wand, jewelry, or clothing.Only affects the wearer. Energy cost to create: 500." Putting Power 3 into an item is virtually cost-prohibitive that would let someone put on a pair of shoes and just start walking.

Is the magic item creation/cost system supposed to be extremely expensive for everything, do all items need Power to be Always On, do all weapon and armor enchantments also need Power to work?

Thanks.