Time
The fact that there is even a complete set of Songs that manipulate time is one of the best-kept secrets of the War. The Ethereal Song is freely available, and the Corporeal isn't precisely a secret, but very few people know that the two are related … and even the knowledge that a Celestial Song of Time exists is highly classified. Either Yves or Kronos discovered them, but determining precisely when or how is effectively impossible. Celestial languages are no more suited for discussing time travel than corporeal ones.
Corporeal (Song of Stasis) - This Song permits the caster to temporarily isolate someone or something (up to 200 lbs.) on the corporeal plane from the flow of Time. For the Song's duration, the target effectively disappears from the universe: nothing (not even a Superior) will be able to affect him, her or it while the target is in stasis. Cherubim and Djinn will have their attunements break as if the target was destroyed (but not suffer dissonance), Lilim will not be able to call in a Geas, attempts to trace a celestial via his Heart will fail, etc. A Shedite or Kyriotate possessing someone in stasis must make a Will Roll to break free in time.
On the plus side, no time will pass for the target, so time-intensive dissonance restrictions will not take effect. The target will also not need food, air, water or anything else while in stasis. Targets may resist with a Will Roll at -4. Once the stasis is over, the target will appear in the exact same spot on earth from where he disappeared: if this would entail materializing in a solid object, then the target will appear at the nearest open space, stunned for 1d6 turns.
Duration depends on how much Essence is spent:
2 Essence - check digit x hours
4 Essence - check digit x days
8 Essence - check digit x months
16 Essence - check digit x years
32 Essence - check digit x centuries
… and so on. Double cost for each additional 200 lbs. or fraction thereof. The base roll is at -3 for each doubling of Essence.
Ethereal (Song of Danger) - This Song provides the caster with advance knowledge of threats. Duration is equal to the check digit, in hours. This warning will usually manifest as a feeling of unease, beginning a few minutes before the threat manifests and steadily rising as the moment of crisis comes nearer. Specific details about the threat are not provided. Use of this Song in combat will provide the caster with a bonus to Dodge and attacks equal to half the check digit, rounded up.
Celestial - This Song permits the user to travel to the past (no one has ever successfully returned from a visit to the future). For some reason, the farthest anyone can travel back is exactly 1000 years … and that's 1000 thousand years from the user's ultimate temporal origin. Use the table above to determine Essence cost; the base roll is only -1 for each doubling of Essence. Also note that use of this Song is strictly one-way: getting back to the present has to be done the old-fashioned way. This is less of an issue for celestials, of course, seeing as they're immortal.
Usually, a successful use of this Song will land the target in the same location, within 1 minute/hour/etc. of their desired time, either way. Taking a -2 to the roll will allow the user to get closer. For example, if a Servitor of Destiny is trying to go back to 1987 CE, he can expect to arrive anytime from 1986 to 1988. If he takes a -2 to his roll, he can define a month in 1987 to aim for, and arrive up to a month before or after that date. The precise time of arrival is up to the GM.
Bonus: Destiny, Fate
Available: Most Older Superiors (Corporeal), All (Ethereal), Yves/Kronos (Celestial)
Disturbance: none for all three Songs, although actions resulting from time travel can cause disturbance normally.