Hakbal of the Surging Soul Kumena, Tyrant of Orazca is great for rushing down players, but a single removal spell often undoes all your work
Cavern fixes mana only for the chosen creature type, but its very powerful in fighting countermagic, even if you choose angel for Atraxa, Grand Unifier alone
(Don't lay your noncreatures out at this point unless they're cards you are planning to play as soon as you have that much manafor example, you will generally cast a [autocard]Daybreak Chaplain[/autocard] on turn two, whereas [autocard]Disenchant[/autocard] isn't usually a turn-two play.) A good "mana curve" of creatures is crucial to a successful Sealed deck
When we are looking to gain life per creature, thats an even bigger bonus
Any cards with the glider symbol (pictured on the right above) will only be legal for play in Eternal formats
I hope we get some more initiative cards in future sets