Each Play Booster contains 14 Magic: The Gathering cards and 1 Token or Art card, including 1-4 cards of rarity Rare or higher and 3-5 Uncommon, 6-9 Common, and 1 Land cards
Cheap card draw spells suffer a lot from being conditional
Moving away from removal, Take Heart is the latest incarnation of the W: +2/+2 with upside instant, joining the recent ranks of Lithomancers Focus, Strength of Arms, Built to Last, Vampires Zeal, and Moment of Triumph
This red enchantments at least guaranteed to mess with combat math
This leads to the following cards being brought in: Flusterstorm is there to hold back their initial discard for at least one turn in order to enable us to set up some kind of progress
I believe this rule existed to allow a little more interaction during combat