The Defense Program being frozen by Eternal Coffin
|Primary caster||Chrono Harlaown|
|Japanese name||エターナルコフィン |
|First app.||A's (ep.12)|
It is only cast by Chrono after he obtained Durandal, which allowed him to use higher-level magic than his previous Device, S2U. Although Eternal Coffin is an Over-S ranked spell (which restricts its usage to all but most powerful mages), Durandal was specifically optimized for it and Chrono is able to use its full power thanks to his past trainings.
Its aria as called by Chrono is "Permafrost, construct a frozen coffin and deliver eternal sleep unto this beast."
Eternal Coffin is used during the final battle with the Defense Program of the Book of Darkness, and destroys one of its defence layers. When cast, Eternal Coffin seals its target in a block of ice, rendering them unable to move.
The spell was originally intended to be cast upon Hayate Yagami after the Wolkenritter completed the Book of Darkness, thus freezing all of them in stasis for all eternity and ending the Book's cycle of reincarnation (or rather, halting it indefinitely). Needless to say, Eternal Coffin is among the most objectionable spells in modern times.