The Clockwork Secret Art was a powerful magic technique that manipulated time and space. Primarily used by the Clockworker Family, the difficult and draining spell could be used for great effect across a variety of purposes.
The Clockwork Secret Art allowed the users to distort time and space by the creation of an electromagnetic field in the place of the caster's choice. The caster could use the spell to reduce or speed up the flow of time within the electromagnetic field, allowing people and objects in the field to move in slow motion or abnormally quickly. Similarly, casters could rejuvenate aged or broken down objects in the field by reversing their time, restoring them to working order; it could not, however, be used to revive the dead as the corpse's soul would not return even if the body were repaired. The spell, if properly powered, could even reverse the effects of demonic possession and uproot demons from their hosts, blasting them into a different dimension.
Casting the spell had the effect of turning night to day and rainy weather to clear, but only while the spell was in force. The technique was activated by reciting an incantation, one of them being the name of the spell itself. The spell was difficult for all but experienced users to do without preparation, and consumed a large amount of magic power. If improperly cast, the technique could be extremely dangerous to the flow of time for the objects it was cast on.
- The technique bears a similar name to the Clockwork Lullaby, Clockwork Medicine, and the Clockworker Family; it is unknown if the name bears any further connection.
- The Daughter of Evil: Wiegenlied of Green (first mentioned)
- The Daughter of Evil: Praeludium of Red (first appearance)
- Deadly Sins of Evil: Gift from the Princess who Brought Sleep
- Deadly Sins of Evil: Fifth Pierrot (mentioned only)
- Epic of Evil: The Daughter of Evil Fanbook (mentioned only)
- The Daughter of Evil (manga)