If you've played for a while, you can probably pull together a Starn deck from your bulk commons and uncommons
Elesh Norn is the star of the bunch, a masterclass in growing simple card design into compelling and evocative full realizations of character and game function
Something as basic as a merchant panel, where a dude shows up every day with new trades offeredwhere the NPC will trade you cards, at different rates
9 Lady Tremaine: Imperious Queen 211/204, Ruby Lady Tremaine: Imperious Queen forces an opponent to banish one of their own characters , so its best played when they only have strong cards to get rid of
Its dangerous for Wizards to undermine their stamp of quality by printing cards produced in a single day, with no playtesting
Many people think of the old-school precons like the Kaalia of the Vast and Edgar Markov decks as highly powerful