What standard black magic? You know, sometimes the reasons for some magic being black and evil doesn't really hold up. I think that best magic for keeping the castle up will be earth magic - that is, elemental magic, strictly neutral.
@TriaElf9: Technically, yes. And there can be reasons why seemingly neutral magic is black. On the other hand, it would be hard to come with reason why hypothetical Rosanne's earth magic or shown Rosanne's ice magic is black and Celyse's fire magic isn't. At least I SUPPOSE Celyse's magic isn't black, this doesn't seem like SUCH kind of story.
Also, Rosanne definitely looks like the type who got the Dark Mage title because SHE's evil and not because her magic is.
The "depends on the world" isn't so reliable excuse. Sure, you can have all kind of different worlds, including worlds where 1+1=3. But worlds with contradictions in physical laws tend to break when someone points out the contradiction.
@hkmaly: I'm not sure exactly what you're trying to say I'm a little confused... why are we talking about physics? When it comes to magic, you can indeed use the "depends on the world" reason since... magic isn't real ^_^; Magic doesn't follow physics, magic has different rules depending on the reality, it tends to be different in each fantasy world (Avatar is another world with neutral powers, for example that are used for evil or good). In fact, if you're an air mage, you can actively defy physics, soo....
It's not hard to come to a reason why Rosanne's ice/water magic is evil and Ceylse's isn't, elements are not inherently evil or good, it's how they're used, that's how I've decided magic works in my world. That's not a physical law, it's more of a moral statement, if anything ^_^;;
I mostly threw around the "evil magic is holding up the castle" as kind of a joke, since there isn't actually any magic on it currently. I was being silly, sorry if they didn't come across in my statement.
Ok, magical laws if you want. But there are actually three sets of laws: one for how magic interacts, one for how physical stuff interacts and one for how magic interacts with physical stuff. And all three depends on world. Different words can have different rules for how water and fire magic interacts, different speed of light, or different ways how can magic influence gravitation ...
Sooo ... Rosanna used spell, which was ice/water, but independently on it it was also evil? Seems confusing. Would be simpler if it was just Rosanna which is evil.
I know it was a joke. I just wanted to point out how silly it was.
(Still, it's better if joke is silly instead of some serious stuff being silly.)
@hkmaly: I think we've mistaken what the other is saying ^_^
Basically what I was saying was that there is magic in the world. Regardless of what it does, it is not evil unless the user is evil, or uses it for an evil purpose, both would qualify it as "dark" magic.