The Union Jack (
The current design dates from the Union of Great Britain and Ireland in 1801.The flag consists of the red cross of St. George (patron saint of England), edged in white, superimposed on the Cross of St Patrick (patron saint of Ireland), which are superimposed on the Saltire of St. Andrew (patron saint of Scotland). The history of the nation's flag was made from a union of the flags of England, Ireland, and Scotland. At the time the flag was created, Wales had become part of England so in respect to each of their cultures, they are represented on either the front or back of the flag. 
It's appearance is a flag, on the front was the current national flag of the United Kingdom and on the back was the primarily white and green flag that had once been used as the national flag of Wales.
PrinciplesEditElizard herself stated that only royalty can use this spell , Union Jack can execute commands that "override" the use of any Curtana. In the case of which Queen Elizard used it, she had all the power divided equally among anyone who considered themselves English or loved England. It also seemed the spiritual item was capable of broadcasting Elizard's speech to everyone as well.
This spell uses the foundation of taking to the extreme the question of "What was it that gave one the right to be a king or a queen?", regarding that the place of "the Royal Family" has been won through history by those who fought for their country or even by those who wanted to become citizens of England and were willing to call England home.
It should be noted that Queen Elizard's usage of the Union Jack spell is the first time ever that the spell has been used in history; and is for that Kanzaki Kaori suspects that the spell is much more deep than simply "a spell that the royal family can use" and thus Kaori even states that the spell was probably possible in the end thanks to Laura Stuart's having a hand on it's procedures