As an example of how weird things can get, the MTG Unfinity card Form of the Approach of the Second Son turns the real-life player into a card - they must balance the rest of their deck on their head, and if they manage to eventually draw themselves, they win
(Your creatures can help cast it
Its a niche land, but one that can swing games by making top-end creatures hit the battlefield and the red zone in the same turn
We want to give new and experienced players an overview for collecting Magic's first real expansion
A Bottomless Pit and a Debtors' Knell alone are enough to give you a pretty significant advantage
I'm not against using it to self mill to get a win with Jace, which sounds like it'd be a VERY good win con combined with Archmage Emeritus, Thousand-Year Storm and Veyran, Voice of Duality, or to fill the graveyard for me to cheat something out with Narset, but I wouldn't really consider that ideal in that circumstance because the ideal situation (in my mind, at least) is I'm using Narset to cast something twice