Ive written about a variety of commanders, such as an ode to my favorite novel series growing up, Redwall, several Rube Goldberg combo commanders, and even an Unsummon-loving waifu
Urzas Saga has a cycle of legendary lands, many of which well see later here, and Phyrexian Tower is just the first of many great ones
Plenty of decks can use a chonky artifact creature that wont stay dead
With 16 games to pull from, Magic: The Gathering's Final Fantasy set has a ton of legendary creatures ready to be the face of your next Commander deck
These are usually better in formats like Modern with fetch lands and shock lands, and worse in EDH, because going from 40 to 10 or so isnt safe at all in these formats
Sacrificing a creature is not a cheap effect, even in decks where you want to do so