Perfidia - Horse editing

First she checked a third scroll to see how Jay was doing. He and Makepeace continued to ride away from Pluxie on Makepeace's horse. The current biggest danger was Jay, who probably never rode a horse in his life, falling off and breaking his neck, so Perfidia surreptitiously wrote the following property into Makepeace's horse: Anyone who falls off this horse will be miraculously unharmed. This property made zero sense in the context of the rest of the world, but she assumed people would not fall off the horse enough times to notice a pattern, and she could get rid of it later regardless.

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[7] Form Specifications Rather Than Formal