An attempt at a Wizard's Tower... but also maybe a desert cube?
The Wizard's Tower format was originally intended to be played using nine booster packs and eighty basic lands, resulting in a 215 card deck. You can read more about the format here: https://luckypaper.co/articles/a-guided-tour-of-the-wizards-tower/
Wouldn't it be fun to have knights exploring the abandoned tower come across a primordial and incomprehensible entity. Or are they entities? They appear to act as one but there are so many.