While that's not the most terrible idea, the likelihood in a Niv-Mizzet deck is that the other spell you're casting is a burn spell that could do the same, and I have to feel that you're going to be better off casting it by itself, rather than putting all your eggs in one basket
The Ruby and Emerald deck is all about going wide and rushing to 20 lore long before your opponent can do anything
Offensive cards almost always do what they were designed to do
Was also revealed the first two cards of the Final Fantasy Through the Ages Bonus Sheet (which will NOT be Standard-legal) reusing existing concept art on reskinned reprints from Magic
That means playing your Sudden Chill song card, You Have Forgotten Me, or any of the other cards that help gain card advantage over your foes
Not only are Toy Story cards on their way, but we'll also get cards from The Incredibles as well