For reference, we will only be covering cards that appear in the primary set in this article
Blade of Selves Giving a creature myriad with Blade of Selves (itself one of the best myriad cards in the game), can be helpful in several ways
Players builds of the Omnath decks were very clunky at the time, and the fast clock and disruption that Mono-Black provided led me right into Mythic
This allows us to retreat Weezing at no cost (otherwise, they require two or three Energy to retreat depending on if you use X Speed)
The back faces of transforming double-faced cards don't have mana costs because they usually can't be cast transformed, although the new disturb ability provides an exception
Instead of getting a brand new toy to play around with, opening a 5th copy of a card only gives you a very small amount of Vault progress, which when fully completed barely gives you any new Wildcards to use