I am aware of a bug where basic egg doesn't even hatch anything. In actual deck I will instead make it that mythical is guaranteed but legendary, epic, rare will try to replace it ( aka instead of it going from rare/basic to mythic ending up in nothing happening just like in this deck, it will go from mythic to rare/basic instead, where if worser rarities don't replace mythical, then mythical and if they do- uh I don't even know how to explain but I hope you understand now. )