The Japanese set releases on June 16th
The standardized size makes cards easy to shuffle, comfortable to hold, and efficient to manufacture
On top of that, Kaya has a passive that reads: Whenever one or more creatures you control and/or creature cards in your graveyard are put into exile, you may choose a creature card from among them
Every time a new combo piece is printed for it, particularly a commander that wants it, it spikes a good amount, so picking these up right after a reprint is a great way to make sure you have them on hand when you want them
Budget Builds: Commander can be played at various budget levels, making it accessible to a wide range of players
However, this mana can be used to activate abilities, giving them more versatility outside of the obvious ramping for artifact-based decks