Its commander is Hazel of the Rootbloom, who can tap tokens for mana, as well as doubling up any tokens
Also, obligatory note that Mutavault is a Ninja that will likely be the heart of any kind of Kaito, Bane of Nightmares deck
The flexibility of this card is unmatched by previous iterations of this effect, and that's why I believe it'll be a cornerstone of Blue-based Control decks until it leaves the format
You have access to specific cards that are both good against them and provide massive standalone advantages in Glorybringer and Chandra, Torch of Defiance
Duplicates in one pack are unlikely, but possible
It also cares about excess noncombat damage to draw cards, which makes Toralf, God of Fury an excellent card to include to spread the love around a bit