Itll be sweet in Depala, also, and it can go infinite with Deadeye Navigator, presuming you have a way to capitalize on the creatures entering infinite times (you will need to crew the vehicle to flicker it, mind)
Aurelia is once again seven mana, Red and White, but this time around is a 3/4 with flying, vigilance, and haste
At the time of the sets release, the Queen was the only legendary creature with monarch-related abilities and she was very explicitly the focus of the story
If you're making a bunch of mana, then you don't much care about playing cards that have low CMCs
He costs four for a 3/5 with two abilities
As the art had to be a seven-headed dragon, I looked for a mechanic that played into the cards seven-headedness