[quote=@Lord Sawsaw2]
<Snipped quote by Sho Minazuki>

This could work with some deep restructuring, but the issue is that Lilith isn't bound by natural sources of light, since she can simply create her own dark spaces to fight in where she fights at 100% efficiency all the time anyway; anyone without a ready source of light goes back to having no chance of winning in a fight.

Time limits, form transformation effects, and in-form weaknesses are the only real ways to go towards making it balanced.
[/quote]

I see your point.

Time limit is easy, and someting I thought of but forgot to mention (and I see where my wording is misleading) She can’t stay insubstantial for more than a few seconds at a time after that, she becomes vulnerable, so continuous attacks (like say, a sword in her, or a drawn out blast) will eventually harm her, and can be fatal if she is forced to reform on them. (Ouch)

Following that train of thought, I can make it so once a part of her turns into shadow, that past is unable to do so again for 3-4 seconds (longer maybe?). A clever opponent might see this and take advantage, or a fast opponent might accidentally find this.

Another thing is that turning into shadow takes a modest amount of magic, which over time will really stack up, meaning that if she takes too many attacks, that alone could leave her nearly drained. Notice that without her magic, she is not that dangerous.

This is an inherent flaw, as any fight she might have would require her to burn through massive amouts of magic quickly. I don’t have any specific numbers in mind, but you can be sure that this will be reflected in how I write her.