any number of cards named mtg Templar Knight (Foil Etched) Cid, Timeless Artificer (0420) -

While we normally rank all the commanders in a set, that doesnt fly with so many potential legends, so well dig into the best and most interesting designs

The other downside to this one is that unless you can remove it, you are obligated to pay the life and draw a card, so it is possible to lose to your own Phyrexian Arena

Its not that far off from Amazon and a little more official than selling through something like Facebook Marketplace

Its also a way for players to control the board directly

Lets use Errant Ephemeron as an example

At the right power level you get efficent threats that just happen to bring along a lord who rewards you in a big way for having a bunch of the same creature type on the board