Devised specifically for Taotie's bloodline powers, the Paragon Consuming Art would not only reduce the energy requirements for Taotie's breakthroughs but also bring her fleshly body and devouring powers to such tyrannical levels that she could virtually consume all entities of the Three Realms.
Usually, while enabling faster breakthroughs, lower energy requirements were not a good thing—the reason being that superior energy requirements led to greater body refinement boosts. The more energy a body refiner needed for a breakthrough, the more powerful they'd become after breaking through.
So, body refiners always tried to expand—not reduce—their energy requirements. But in Taotie's case, this wouldn't matter. With the Paragon Consuming Art, Taotie would have to face cataclysmic tribulations after each breakthrough. The faster her breakthrough, the more dreadful the tribulation would be—enabling Taotie to more than make up for her lower energy requirements.
