Storm the Vault / Vault of Catlacan can slot into Izzet decks that focus heavily on slinging instants and sorceries, but it truly shines with artifact- or Treasure-matters commanders like Galazeth Prismari (or Breya, Etherium Shaper, if we expand the color palette)
Here is an example of the difference between zero as a dividend and a divisor: A dozen donuts divided among four people is three donuts per person, 12 4 = 3
Even if this proves to not be an issue with this Secret Lair, who's to say it won't be an issue the next time they try to do this with an external IP and that it wouldn't involve a card that both isn't legendary and is something that ends up being a four-of staple in numerous decks
Fetch lands will also trigger this for free, and you can make use of the 10/10 body even while the baloth's stunned
For Mewtwo V SA Chasers Heres where the math gets interesting
Draft Archetypes Final Fantasy is like most typical Magic sets, where the Draft format is centered around 10 2-color archetypes