While white has other token generators that are also sagas, particularly in current Standard, the sequence of token batches over multiple turns uniquely captures the progressive nature of the summon's animation, rather than creating them all at once
Another store you can do this with is Gray Viking Games
It's the lead card from each of these decks that's now been revealed: Terra, Cloud, Tidus, and Y'shtola
This binder has 20 pages and can hold up to 360 cards with or without sleeves
That certainly caught me off guard initially, but it does make sense in the context of Magic, where Wizards are mostly commonly represented in the blue-red color pair
Cost reduction for activated abilities makes this great for a combo-esque deck using Training Grounds effects to enable a busted combo with cards like Kenrith, the Returned King