Granted, this path and the ones involving tokens lean a lot more in the combo direction than the mana acceleration direction, but its definitely worth noting Carnival of Souls capability of being useful outside unreliable 3-4 card loops in these strategies, as it gets a bad rap Im not convinced it fully deserves when reading about its capabilities elsewhere
For a list of errors including uncorrected cards, please see this list created by the members of Bulbapedia: Error cards, which was recently updated by @fritz
Cards like Avacyn, Angel of Hope and Throne of Eldraine are too much to expect from such a cheap product, but there are many angel staples like Lyra Dawnbringer, Starnheim Aspirant, and Sephara, Sky's Blade that would be reasonable inclusions
They're just sort of treated that way for combat purposes
Into the Inklands Ruby/Sapphire Plenty of Pluck Sorry to any Ducktales fans out there but the Plenty of Pluck Starter Deck is our pick for the bottom of the barrel