Even Ravnica , with its plane-wide megacity governed by 10 philosophically-opposed guilds, is an obvious adoption of the famous Planescape campaign setting and matches many D&D urban fantasy tropes in the process
This means that if you cast a spell from the top of your library, you can't look at the next one until you're done paying for that spell
Some doors have abilities that trigger whenever you unlock that door and require one or more targets
There is something to be said about the snowball effect of proxies
Speaking of Magic heaven, we can assume thanks to the Flotilla, Merfolk, and a few cards from here in Mirage, theres a whole Sphere dedicated to Goblins who got too close to water: Quick, Rhirhokteach me to swim!Makht, goblin casualty Turn your back for a second and they just vanish