A bit off topic but...
Lyrica's Illusion notes could be used in the same way
If I'm not mistaken, Lyrica music and sounds are those that do not naturally exist in the world/sound that have become "extinct" -Thus they are illusions.
Also, on the contrary, Lyrica's music is the only "safe" one out of the three sisters.
(i.e. you won't be going "AHAHAHAH I CAN FLY!" or "...So depressing...I wanna die...")Yuugi could summon extra terrestrial beings, undead, mythological creatures or even miracles with her power over the supernatural.
Yuugi's ability " to manipulate 怪力乱神", is as far as the word is concerned, phenomena that not even the word can can describe...
So, by saying aliens and mythological creatures and all, those are stuff that her ability doesn't do.
...To think of the chaos that over goes that... actually Yuugi's ability might probably be one of the scariest.
Also, going back to the "Knowing Meteor but not having enough MP" expression, scary thing is that Yuugi will probably have plentiful MP to use such a thing.
...Thankfully, knowing her she'd probably stick with either controlled danmaku or fist fights.