User blog comment:KnocknickKnock/Lucy's Unused Power!!!!!!!/@comment-7418318-20140713152910

Virgo came under her own power, not under Lucy's, so there was no hidden power supply involved in that.

As for Urano Metria, I think there are ways to explain the seeming inconsistencies with that spell, but rather than re-iterating again, I'll just link to the blog I made about this topic in the past.