Actually, as odd as it sounds, the best home for Invasion of Ravnica might be in Niv to Light decks in Pioneer
It's not hard to see why Phyrexian Arena is so popular in Commander
That +1 ability seems innocuous until you start combining it with fetch lands and alike, and the -1 has redefined what creatures are playable in Modern and beyond, where cheap, efficient spells are key
For the most part, the Worlds Smallest Magic the Gathering Duel Decks are just cool, collectable items
It acts as an incredible anchor for dedicated villain deck users, forcing opponents to split their focus between dealing with lesser threats already established on the board or tackling the king himself to put a halt to the strategy
When it enters, we can destroy an Artifact, Enchantment, or a Land