Easy two-for-one on card advantage and should be right at home in any squirrel deck, plus a very reasonable inclusion in other green decks
From there, its all about who gives in first
One other Rare, One Last Hope, seems like the kind of card that will be essential in both Sapphire/Steel and Ruby/Steel challenger decks
Double Down Regular art price : $4.74 Extended art price : $9.90 Double Down is mainly an enchantment spell for the EDH format, as thats the only format where such tribes as assassins, mercenaries, pirates, rogues, and warlocks have any legit chance of winning games
#5: Ossification If white-based control leaps into viability, Ossification will be right there with it
It remains to be seen whether this is worth losing access to all of the cascade support that includes green, but hes still definitely a powerful commander