Ah, I wasn't aware that could happen.
I had wondered how an experienced red mage like him, plus the planeswalker power-up, could have died without leaving behind signs. So when you indicated the self-sacrifice of a planeswalker between Sylvester and us, that was a potential fate for Surya.
A single-use Spark, if such a thing exists, is a much better explanation, though.
Normally, it can't. But normally, planeswalkers don't fragment and distribute their Spark amongst their relatives. I've heard of Spark transplants, and spells that consume the Spark, but not whatever Sylvester did. We're trending on completely new ground here.
That said, we know Suryastra experimented with gathering and fusing weaker Agni Sparks to make a stronger one. So it's possible he got to a point somewhere between a full Planeswalker Spark, and an Agni Spark, when he inevitably applied his technique to Surya. There's no one else he'd have done this for, since he was probably as dedicated to Surya as Astra is to us.
I just spelt it how I think it would be pronounced, rhymes with height.
Mine would be more like "day-ite". Which is fairly close to "deity". Same with the spelling.
I mean, part of the problem with the "am I really a god" question is that... well, what is a god? a miserable pile of miracles Is being a god an innate thing, where you're either born a god or not? If so, what characteristics are required, and are they the type that someone can determine about themselves? Alternatively, is being a god more just a way of quantifying individuals who have reached a certain level of immense personal power? If so, where's the threshold? Just with these few questions, you can muddy the definitional waters sufficiently that the only thing you can say for certain is that a given individual either definitely isn't a god, or that they might be a god. Which means the question of whether you can have a god complex if you're a god is a somewhat academic question until a clear definition of what a god is gets established.
That being said, in general, if being a god still allows you to have peers, then my opinion is that yes, a god can have a god complex, at least among the subset of your peers.
In this setting, it has a lot to do with gaining power from worship, from what I understand. You can be a power to rival the gods without being one, see also; Siofra's ascent to godhood and superiority over a goddess in combat, or Natsu defeating a god in Fairy Tail canon.
I strongly disagree, unless you're just talking about physical superiority and/or mystical superiority; the fact that she's superior in those areas is undeniably true but doesn't matter as much for empathy purposes. What worries me is that Jade might get to the point where she decides that her decision-making is inherently better than everyone else's, and that therefore she is better than everyone else. As things stand right now, her decisions matter more than most people's because she has more power to make it happen and to prevent pushback. Nothing inherently wrong with that, so I'm fine with Jade understanding that dynamic, as long as she doesn't start to think that because her decisions matter more that they deserve to matter more. That other people's decisions are worth less than hers just because she has power. That because Jade is who she is, she can disregard everyone outside of her little ingroup and consider them expendable. As long as Jade doesn't start thinking her decision-making is superior, I'm good, because that allows her empathy to be preserved. But I see no compatibility between "I am superior" and "I feel your pain", because the first inherently considers themselves to be a step above what everyone else feels and thinks.
I can think my reasoning is superior without losing empathy. Same with decision-making. Lord knows, I have empathy for babies, despite being fairly sure my decision-making is better. Same for teens who have their minds bathing in hormones.
Empathy is a bit more complex than you're making it out to be. It's the ability to put yourselves in their shoes, to consider the what-if of being in that person's situation, and how you'd react. It's never a complete understanding, even for Empaths, who aren't able to experience any emotions preceeding their reading of the person's emotions. But it's enough to make you sympathize.
What you're worried about isn't about empathy or superiority, but arrogance and an unwillingness to consider that what you're doing might not be the optimal course of action. That you always know best. That's related to empathy, in that it makes it harder to put yourself in other people's position sometimes, or means you run roughshod over them, but it's somewhat different, as well.