Changes

* This card can be [[Searcher|searched]] by "[[Rogue of Endymion]]", "[[Watch Cat]]", "[[Watch Dog]]", "[[The Despair Uranus]]", and other [[List of generic searchers#Spells|generic searchers]]. * This card is good for "[[Dark Magician]] decks" Decks, since you can use powerful effects like "[[Diffusion Wave-Motion]] " and "[[Dark Magic Curtain]] " without having to pay any [[Life Points]]. * You can use this card to make cards like Combo with "[[Final CountdownAbyssal Designator]]" first, then "[[Brain ControlAutonomous Action Unit]], ". ==List== * [[Autonomous Action UnitSpell Card]]s that require paying Life Points when activated: (Note that cards that use the amount of LP paid as part of their effect, such as "[[Delinquent DuoStar Blast]], " and "[[Toon WorldPsychic Blade]] free to use", cannot be activated while "Spell Economics" is on the field.) {{Card query|[[Card type::Spell Card]] [[LP::Pays Life Points for cost]]|medium=official}}