Bombyx Caterpillar, Ithad the abilityto allow the user to Convert the Food they eat into Energy. Although it might sound powerful, it is not, It just helps you workout. In order for itto beuseful, you need to consume refinement materials. The Effects of Refinement Materials only lasts for a minute so it is worthless. Itis usedto build your body shape and eat faster. It is a very Popular Gu For "Young Masters" and Old Aged Men.