According to a complete card grading strategy guide, centering standards for gem-mint grades are demanding across all grading services, with most requiring no worse than a 55/45 ratio
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This doesnt mean enfranchised players cant enjoy the themes or decks, but Id expect this to be uninteresting to most without significant reprints like the Tempest Medallions
So Survival Brace could certainly prove useful, but it does seem to be one of the less impressive Ace Spec cards so far, overall
To be fair, I guess to be the best colour, blue needs something to deal with a Serra Angel or Sengir Vampire, should one of these threats be fortunate enough to slip through your defences of counter-magic
Landfall Whenever a land you control enters, Choco gets +1/+0 until end of turn