Each booster contains 10 Magic: The Gathering cards and 1 Traditional Foil double-sided token, with a combination of 45 cards of rarity Rare or higher, 5 Uncommon cards, and 01 Land cards
Its a fairly useful common and made a great pick in Limited formats of its time
The Wizards Play Network YouTube channel uploaded an unboxing video that shows off the contents of the upcoming Game Night: Free-For-All product
In general you want this on turn one and no there after as the ability ceases to deal with the things being made
You'll want to spread out your permanents to make that very powerful
So, for example, if your top two cards are Brainstorm and the transforming double-faced card Delver of Secrets // Insectile Aberration, you will end up with a modal double-faced card in one of the following permutations: Brainstorm // Delver of Secrets, Brainstorm // Insectile Aberration, Delver of Secrets // Brainstorm, Insectile Aberration // Brainstorm