Ive mainly played Draft, Sealed, Pre-Release and Standard from Prophecy until Throne of Eldraine and Commander only started after that
As they print more of them, well start to see a greater number of must-answer lands per game
Four were just revealed on the livestream for Japan's Champions League
The actual K9 package is fairly extensive, and what takes it from a Gamma/Driver handtrap package to a true second engine is 3 copies of K9-66a Jokul, helping us Summon Urubonus or our other K9s for free, and searching most often an Izuna once its on the board
For the Pokemon fans who wants functionality over anything, the Pokemon Center also sells home goods
While this may not seem like much at first, if a second land enters the battlefield under its owner's control, its controller adds four mana to their mana pool