Wizards' teaser post shows the Enchantment Imprisoned in the Moon most prominently - the other three are just there to reprise Destiny's now incredibly tired marketing slogan 'Eyes up, guardian'
It reads: Draw a card if an opponent has cast a blue or black spell this turn
And when those vampires with the Demon type die, they turn into tapped 4/3 vampire demon tokens with Flying
You need most (or all) of your value upfront, because nearly every deck in the format is designed with the ability to check cheap creatures
Leyline of Sanctity In response to the resurgence of various Deaths Shadow variants like Grixis and Jund in the post-Uro Modern landscape, MTGO tournaments have also seen a rise in Selesnya Bogles decks that look to exploit the abundance of targeted removal being played right now
Thief is just a great utility Ninja that is cheap to activate, allowing you to gain an early-game advantage with the Treasure and to put some of the big hitters back in your hand to recycle