Core Energy

Core energy is the most common type of energy used for skills. With an exception of Sophie Foster, this is the only source of power non-ancients can master. This is first mentioned in the first book, where it is described to be the reason behind the power and strength of skills. When drawn upon, the elf using it feels a pull in their gut. It doesn't mix with mental energy, causing the forces to rebound when they come in contact. Such happened in the Ultimate Splotching Championship.