Your search for "For the Common Good 321" revealed the following:
Marching Duodrone (CLB) from Commander Legends: Battle for Baldur's Gate, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Sean Murray Card Text:Whenever Marching Duodrone attacks, each player creates a Treasure token. (It's an artifact with "T, Sacrifice this...
Marching Duodrone (Foil) (CLB) from Commander Legends: Battle for Baldur's Gate, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Sean Murray Card Text:Whenever Marching Duodrone attacks, each player creates a Treasure token. (It's an artifact with "T, Sacrifice...
City of Brass (2X2) from Double Masters 2022, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Kirsten Zirngibl Card Text:Whenever City of Brass becomes tapped, it deals 1 damage to you.T: Add one mana of any color.