The reason why this card is the most expensive of the four featured in this article may be because it serves as a very effective board wipe as well as dealing damage to opponents while providing the player life gain
Clouding Clouding is a loss of shine or a hazy appearance that can affect the surface of cards (especially foil cards), making them less bright or slightly foggy. It can be caused by normal card wear, such as friction with other cards or micro-scratches, which gradually dull the surface
Flash is great in duels since you can flash out when you are attacked to block, or kill an attacker with a Ravenous Chupacabra or Eternal Witness a key instant thing like Swords to Plowshares or Counterspell to cast it instantly in response to something
Deathrite, Stoneforge, Snapcaster, Swiftspear, Baleful Strix, the cascade dorks and perhaps a couple more cards are all just so good and at the top of the pile so as to obscure trends further down
When you do play red, be on the lookout for: Explosive Derailment, which is reds best common and one of the only red commons youll ever see me splash
Darksteel Mutation is a card Ive been using since I started playing Commander and I'll continue to fall back on this card when sticking to mostly Battlecruiser to Low Power decks, where removal is less abundant and optimized