As long as cheap spells exist in Modern, Chalice will reign supreme
For instance, Mila, Craft Companion might be mono-white, but its other face, Lukka, Wayward Bonder is mono-red
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Muddle, the Ever-Changing: Muddle's ability resolves before the spell that caused it to trigger
As I said before, I do have some worry that the strength of the current Izzet shell would vault Twin to the top of the meta almost by default, which could require another banning
Also, if you cheat one onto the battlefield without paying for it, none of its doors unlock - which could make them pretty bad targets for reanimation spells
To make it feel like a lands deck, it needs to be about moving the lands around in interesting ways sacrificing them for weird value but consistently replacing them so you dont end up behind on mana