Earlier that year, Adam Yurchick mentioned Vanguard in a finance piece
(Food is an artifact with ", , Sacrifice this token: You gain 3 life." Treasure is an artifact with ", Sacrifice this token: Add one mana of any color.") Creature - Elf Scout Topiary Stomper Vigilance (Attacking doesn't cause this creature to tap.) When this creature enters, search your library for a basic land card, put it onto the battlefield tapped, then shuffle
In the case of Elsa, Spirit of Winter, it helps that the card itself is also one of The First Chapters stronger picks, offering the power to freeze your opponents characters to stop them challenging your cards or questing for lore
Ghoulish Impetus is a souped up version of the Vow cycle either preventing a dangerous combat threat from attacking you or forcing a fragile utility creature to repeatedly risk itself in combat
But with the Fallout energy-based precon released earlier this year and Satyas Creative Energy precon deck, energy players appetites can be sated for the time being