

Location of the Crest varies: Rin Tohsaka has hers on her left arm, Kiritsugu Emiya had his on his back, and Gray has it on her right hand, while Heine Istari had it on his leg, and Olga Marie's is located on her forehead. Furthermore, it is possible to use it to support the magus' regular spellcasting and, whenever the magus gets heavily injured, the Crest is capable of keeping them alive for as long as there is still magical energy inside their body. All he has to do is to activate the Crest just like he would do to a normal Circuit (by running magical energy inside of it), find the spell stored inside and activate it with its relevant incantation and thaumaturgical process. As long as the Crest is completely integrated with the magus' body, he will be able to cast any spell recorded in the crest, even if he himself never had the chance to learn it properly. It is the duty of any heir of a family of magi to successfully expand and pass down the Crest to the next generation.Īs the complexity of the Crest increases with each new generation, the spells stored inside them become more stable and easier to activate.

As the process repeats itself with each new generation, the older a lineage is, the greater the number of Circuits forming the Crest, and the greater the amount of knowledge stored inside it. At some point of the magus’ life, he will forge some of his own Magic Circuits into the Crest, store many, if not all, spells that he learned in life and then pass it down to his successor. Engraved on the body in a variety of shapes, most typically in a magic circle, a Magic Crest is a series of Magic Circuits that were given a more stable form in order to act as an archive of thaumaturgical capability.
