The supply of vintage error cards is fixed and declining as a percentage of what is available for sale, creating fundamental scarcity dynamics that support long-term price appreciation
Kess, Dissident Mage or other commanders which can flashback Approach are good because they let you focus entirely on getting copies to the graveyard, instead of having to hold a couple in hand
Can also be played online, though there's software to download first
3 Run A Tournament To Win The Good Cards Tournaments are a core component of any TCG like Yu-Gi-Oh
Otherwise, they may put it onto the battlefield face down as a 4/4 red Present creature
Kellan, the Fae-Blooded I think its really cool to have an Adventure card you can cast from your command zone, and Kellan makes for an awesome Boros build-around for an Auras- or Equipment-matters Commander deck