Often, while building up to that strong board position, a few creatures will end up on the other side of the table
Bandai Namco mentioned an open beta in the future (we don't know the date yet), at some point after the Closed Beta ends
While two mana for two cards each turn is definitely a good rate, there is a very real delay with Sylvan Library: it takes a whole turn cycle to actually do anything, which, as well see with the rest of the list, makes it fairly slow by comparison
The same is also true of any other abilities that modify how a land enters the battlefield or apply "as" a land enters the battlefield, such as the first ability of Cavern of Souls
If the gift was promised, all permanents you control phase out, and until your next turn, your life total cant change and you gain protection from everything