"It's not to say that the four basic elemental attributes are not important. In fact, their interplay is much more dynamic. Take combination magic as an example, it becomes significantly easier when it is employed using the fundamental elements. Although I haven't delved deep into this, it is evident that elemental compatibility is much more readily apparent within the basic elements. Even between water and fire, transformation from one to the other is possible. While fire and water elements are conflicting in nature, a sufficiently intense fire can convert water into its fuel. However, such exchange between light and darkness is absolutely impossible. Thus, 'Water-Fire Common Origin Magic' can still be applied. But have you ever heard of combination magic between light and darkness?"
"Also, Dangdang! You've practiced the 'Illusionary Heart Diversion Technique', haven't you?" Wu Di asked Long Dangdang.
