Okay... seeing that it was apparently not as clear as I thought it was, have a few words on the topic of
Spell Synchronisation.
As the name suggests, this practice regards the creation of a new Spell from casting two or more other Spells together. Any such Spell becomes available to any party involved in its creation and gets the (Synchronize)-Ability to indicate its origin.
[Note: Not every Spell created this way becomes a regular Spell for the creators to use; it is a case-by-case basis and, as far as I see, arbitrary]
Rules for synchronising are as follows:
-at least one of the people involved needs an Ability that enables the synchronisation of Spells
--A special case of this is one of the Spells in question having the Synchronize-Ability (without parenthesis), which indicates the same thing
-The Spells in question need to either
--A) Share an Affinity, or
--B) Have a comparable theme
When a synchronisation is successful, the Spells merge into a new Spell which is then cast in their stead. Take note of the fact that Synchronised Spells are usually particularly strong.
To explain the matter on Sky's
Dream of War:
Magical Girl Nightmare Child possesses the following Ability:
Bulwarks Guarding Sleep
-Nightmare Child may synchronise her Spells with her allies
Now, while she showed her melee-focussed Spell
End of the Line to Anastasia during practice, Ana was in the process of casting her own
Rapid Digestion. Both of those Spells have the Horror-Affinity and thus synchronised into a Spell you do not know about.
After that, due to Sky being interested and also lacking a good solution for ranged combat, they attempted to synchronise Night's
Demon of War with Sky's
Let the Sky Fall.
Again, both of those Spells shared the Horror-Affinity. One of them being limitless and focussed on her crystals, the other a beam of barely rivalled destruction.
Out of this formed
Dream of War
Rekindle the green light that brings the end of armies
Level 1
Base Damage: 2,000
Magic Modifier: N/A
Affinity: Horror | Fable
Ability: Proxy-Caster | Ray | (Synchronize)
Which is exactly what they wanted. They
could have continued synchronising, but having a dozen Spells at hand was not really on their minds at the time.
Now, I know that this is not indicative of both characteristics described above. Neither of these was created with a theme-match.
To give a few examples what would be matching themes:
-Spells that are cast by swinging your weapon
-Beam attacks
For a more direct example: If there was a way for Eva and Spring to synchronise, they could combine
Revitalise and
Become Whole Again, seeing that both are healing Spells that are cast by laying your hands on the target.
Additionally... @Crystalwatcher, please correct me if this is incorrect or something is missing.