You could fairly easily loop this, though you'll need more damage than that to close out the game
Not every card holds its value, and format legality matters more than rarity for most players
You can also score Endless Punishment as part of the Duskmourn Commander Deck bundle at Amazon, which is currently down to $189.20 for four decks (dropping from $242.97)
Merry, Warden of Isengard and Pippin, Warden of Isengard provide excellent food synergy in this deck, and also help further your theme of constant access to key creatures via their partner ability enabling you to pull the missing warden out of your deck when you cast the other
Note that this doubles all damage they deal, not just combat, so that means Guttersnipe is dealing 4 to each opponent, and Prodigal Sorcerer is tapping for two