Taking a creature from your opponents graveyard pairs well with aggressive decks and as a defense against some deck strategies
Players looking to exploit energy in their commander decks will be faced with hard choices in both the command zone and the 99, but you can get a jump-start with this guide to energy commander decks
Our complete series of Kaladesh Spoilers for Magic: the Gathering will give you a complete run down on every single spoiler card revealed over the pre-release spoiler season
In his Making Magic War of the Spark article, I think Mark already revealed what Battle is
The second one, Digital Sensation, is a much more popular set of individual cards, as I went over back then, with more than one getting their first special printing
Then you'll tap dorks smashed and players cannot cast non-creatures this turn so it's got more value than shoot and kill for tapping them for an Alpha Strike or just shutting down interaction on your turn