Generally, Jeskas Will produces seven red mana and exiles three cards for you to play
Dont get me wrong, you will be hard pressed to find better board wipes for enchantments in other colors, and cards like Bane of Progress, Whiptongue Hydra, and Whirlwind are all pretty strong
This Town Ain't Big Enough : with the ability to bounce any kind of nonland permanent that either player controls, this gives self-bounce decks incredible tempo, keeping their opponent's permanents off the field while returning their own bounce targets to hand
Also, like DTK, Origins is up against several previous sets worth of very, very powerful cards that may preclude many of the new cards from seeing extensive play until the fall rotation in October
Hopefully this has given you an idea of the cards to look out for and maybe piqued your interest into the set if you werent already excited