Amaterasu

There's gotta be some more description for how this spell works other than "burns every thing". Perhaps a listed amount of fire damage as an AOE, maybe it instantly incinerates objects only turning them to ash, or perhaps it's special fire which only affects certain creatures caught in your Genjutsu.

Very useful and balanced spell!!! put it in my own campaign, it is really hard to balance properly but I'm glad it is done here so well.

nuh uh, cus my everything proof shield deflected it