Commander's Sphere is also widely popular for similar reasons: You ramp and fix mana with this rock, and draw a card when needed (for 0 mana, even if tapped out!)
But neither card can match the absurdity of Natural Order, which, for the low, low cost of four mana and sacrificing a green creature, lets you put the best green creature from your deck directly on the battlefield, which often means your opponent staring down a Progenitus or a Craterhoof Behemoth as early as Turn 2 or 3, which is pretty wild
But there was a lot of other things going on at the show, including a few different opportunities to snag exclusive trading cards
Krenko is substantially more powerful than Beetleback however you are using them pretty much for the same thing and the Chief is substantially quicker and more reliable
Partner this card with Sanguine Bond, and you have a nigh-unstoppable chain reaction that will drain your opponents of all their remaining life
The big issue for those languages is that Stitch Carefree Surfer (not the Enchanted version) has one lore instead of two