Activating Yuriko's commander ninjutsu ability isn't the same as casting Yuriko as a spell
The S4a Shiny Star V card list covers the closely related sub-set released a few months later
Exiled off the top of each players library, this effect can also mill through a bunch of land
Here's the thing: how fast you collect the set (how many drafts you need to do, which is proportional to how many gems you need to spend, since you can't "go infinite" with ranked drafts) depends MUCH more strongly on how many "new" Rares you collect each draft as opposed to how many games you win
While he comes prepared, the re-prepare cost is a bit steep: exile eight cards from your graveyard
Per the Hasbro-owned Wizards of the Coast, this full set release marks the beginning of a new chapter in Magics long-standing partnership with Marvel, which was amplified last year with the drop of a highly popular collection of Secret Lair cards one-off, limited time offerings that are distinguished from the main cycle of Magic cards that are regularly released