You should definitely check out the mechanics article to get a full sense of what's going onor, for a shorter bite-size version, check out these videos that cover the mechanics in depth: Welcome to Kaladesh It's a brand-new block, and it's hard to find a better time to come check out a Prerelease
Pinsir was briefly lent to James to use in an attempt to capture Magearna
When you add in time for rolling and wacky effects, Planechase Commander games can take a while, too, so you should probably expect to settle in for a little longer than normal, though some of the new planes really encourage attacking and moving the game along, so maybe less than you might think if you're used to Planechase Commander already
Hellkite Tyrant Hellkite Tyrant just needs to squeak in one bit of damage to take all those mana rocks, treasures, clues, and even food from your opponent
Its nothing fancy but its at least flavorful to compliment the D&D universe