This can be abused by your opponents, though, to get more ETBs
However, prices vary significantly per set, as some are simply more popular than others, and Pokmons production decisions impact availability

At a rate of approximately 1:7 for Sets: Kaladesh Remastered , Adventures in the Forgotten Realms , Streets of New Capenna , Alchemy: New Capenna , Alchemy Horizons: Baldur's Gate , Dominaria United , Phyrexia: All Will Be One , Alchemy: Phyrexia , March of the Machine , The Lord of the Rings: Tales of Middle-earth , Wilds of Eldraine , Alchemy: Eldraine , Alchemy: Ixalan , Alchemy: Karlov Manor , Outlaws of Thunder Junction , Modern Horizons 3 , Bloomburrow , Alchemy: Bloomburrow , Duskmourn: House of Horror , Alchemy: Duskmourn , Magic: The Gathering Foundations , Aetherdrift , Alchemy: Aetherdrift , Tarkir: Dragonstorm , Alchemy: Tarkir , Edge of Eternities , Alchemy: Edge of Eternities , Magic the Gathering | Avatar: the Last Airbender , Lorwyn Eclipsed, Secrets of Strixhaven, Alchemy: Strixhaven At a rate of approximately 1:6.5 for Shadows over Innistrad: Remastered At a rate of approximately 1:6 for Sets: Amonkhet Remastered , March of the Machine: The Aftermath

Magby costs 400 Pack Points to craft