>>96408539
>One could just run the legendary as a commander
That's not really an option depending on what you need the legendary creature for. For instance, I really want to see Oketra The True when I play Odric Lunarch Marshal, but I wouldn't want to play Oketra as the commander. The two keywords she gives the board are incredible when working with Odric and that she can also make vigilance soldiers is great too. These keywords do a lot in Odric but wouldn't do as much if I tried to play Oketra herself. If I already have Oketra then I can dig up Myrel, Mangara, or the other Odric too. All of which would be useful. Finds Akroma Vision Of Ixidor too for a game ender. None of which give anywhere near the same deck feel as Odric. Eventually I guess it also gives flying which is a plus too? Haven't had the time to really test The Seriema to see if it would play out well in the deck well or if I'd be able to station it with any consistency to get that flying, but I see where it could be useful at least.