The biggest issue with other cards that provide additional draw effects for your opponents is that the player to your left, the player whose turn other additional draw effects would help first, has access to the extra cards first, giving them an advantage over your other opponents
Even if you're in mono-blue, unless you're a full-on "there's only so much fun in a game of Magic, and I'm here to have all of it" person and are playing 40 CounterspellCounterspells, there's now a better option in Thunderclap DrakeThunderclap Drake
At one point he untapped every time you cast a blue spell instead of at end step, but that proved to be a bit too powerful
Unlike all the mechanics I just mentioned, these actually do change what mana value the spell has on the stack
He also finds great comfort in the stories his mother has collected around the Multiverse and would like nothing more than to see it for himself one day." Nashi's adoptive mother Tamiyo, meanwhile, "is a pivotal main character in the Neon Dynasty story at assisting in battling the baddies with her scroll magic