The PAIN Cube.

Unpowered vintage cube, but every card has a drawback of some kind. Whether it has defender, makes you pay life, forces you to sacrifice creatures or discard cards or exile cards from your graveyard, every spell comes with a cost beyond mere Mana. Was debating making this a desert cube but I'm def still up in the air on that one. I was also debating including ante cards and some type of ante mechanic but I don't know if that would just cause bad feels so I'm marinating on it.

Edit: F it I added ante cards. This is a good choice and I do it with no hesitation. That said I will reverse it at my whim because that's how a good king does