Enigma fusion

 is a concept in the Magical Vacation series, originally appearing in Magical Vacation.

Summary
Enigma fusion is a process by which an enigma fuses into the heart of its host body, but not unless the host is vulnerable or willing to conduct a fusion. Once the fusion is complete, the vessel's thoughts are greatly amplified to match the same wavelength as the enigma, in turn releasing incredible amounts of power. Although the vessel's will and consciousness are still in tact while under possession, some drown in the power brought about by fusion, and gradually surrender themselves to the enigma. This causes the vessel to act erratically, and in time, the enigma takes over their consciousness and body. In some cases, vessels can control the enigmas' power within them and still retain their consciousness.

A less common phenomenon is de-fusion with an enigma. In order for a host body and an enigma to separate, the host must relinquish all their magic. Although only two instances of de-fusion have ever been witnessed, those being Equillekrew from Candy and Kerendu from Ganache, doing so allows the former vessel to awaken to an expanded state of consciousness.

List of fusion vessels

 * Biscotti with Yuvick
 * Candy Mintblue with Equillekrew (undone)
 * Ganache Nighthawk with Kerendu (nearly fused, undone)
 * Vanilla Nighthawk with an unspecified enigma
 * Quattro Formaggi with a dab hasnel
 * Marcher archer
 * Kamakiri
 * Anemeny