One of the most recent promo cards was the adorable hat-wearing Pikachu for the Pokmon GO
Child has a better front side, letting you spend your mana making Wolf tokens, progressing the deck's gameplan while making it less painful for you to skip your turn not casting spells to switch day to night
Of course, it depends on how you want to take the deck itself, but these should fit in no matter what
Kessig Flamebreather and Firebrand Archer both have the same effect, dealing one damage to each opponent whenever you cast a noncreature spell
They make for the vault, navigating the complex traps, and eventually reach the last door, where Kaervek begins to break the ward protecting it
He later re-appeared in Pokmon Journeys: The Series