Here was the next iteration: Inscrutable Sphinx (version #6) 4UU Creature Sphinx 4/4 Flash Flying When CARDNAME enters, look at the top five cards of your library and separate them into a face-down pile and a face-up pile
I doubt we'll see this exact mechanic return in the future since its flavor is too tied to the original video game, but it's clear that WotC likes bringing back this core mechanic since it doesn't need to be named like with Kyoshi Battle Fan which came out a few months after Final Fantasy in Avatar: The Last Airbender
Solphim, Mayhem Dominus Damage doublers can be absolutely devastating in a burn deck, and Solphim, Mayhem Dominus lets you run one as your commander
The fuse mechanic in Dragons Maze allows you to play both parts of a split card if you pay their mana costs combined
A good idea for deck building is to use cards that have similar strategies to compound how much of an effect they have
There's a ton of powerhouse Aura commanders you can build around, with the absolute top being probably Light-Paws, Emperor's Voice