Your search for "Guardian Archon 344" revealed the following:
Guardian Archon - Extended Art (C21) from Commander 2021, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Scott M. Fischer Card Text:FlyingAs Guardian Archon enters the battlefield, secretly choose an opponent.Reveal the player you chose: You and target...
Swamp (344) (SCD) from Starter Commander Decks, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Mark Poole