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
Repeat this as many times as you like to draw your deck, setting you up for a Thassas Oracle win when your turn rolls around
I wouldnt play all of these cards in my own Commander decks, but Im certain that most of them will appeal to a lot of different players
As a result, with the modern design philosophy and sensibility, it's really difficult for Wizards to print cards that even have the potential to be banned in Standard
The flavor also makes me really happy
Probably better suited as a 99, though not an awful choice to head a discard-themed deck