Though ostensibly designed around the Modern format, Modern Horizons 3 has plenty of power on offer to be used in Commander, Pauper, and other fan-favorite formats
Tetzin, Gnome Champion offers a cool alternative EDH deck that focuses specifically on transforming artifacts
Creatures don't even need to actually deal combat damage for Hopper's ability to trigger, they just need to have been declared as attackers letting you Maze of Ith or Labyrinth of Skophos a creature to get them out of harm's way but still get that clue
Modern Auras now replace themselves, offer heavy protection like Ward or Indestructible, or provide such a massive power spike that the risk is easily worth the reward
GX cards followed in 2017 during the Sun & Moon era
Battle cards represent Phyrexia's invasion of familiar planes like Dominaria, Innistrad, and Ravnica but also little-known settings like Xerex, Pyrulea, and Ergamon