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That depends on what youre after, and on what a box reliably gets you versus what it leaves to chance

For example "During either player's turn, when your opponent activates a card or effect: You can negate the activation, and if you do, destroy that card." becomes "When your opponent activates a card or effect (Quick Effect): You can negate the activation, and if you do, destroy it." Also, avoid using this on Traps, as they are by default Fast Effects (Fast Effects means Spell Speed 2 and 3), so they can be activated in response to other effects

In particular, Astellar of the White Forest is a real standout, with the cards value reflective of its potential potency

It doesnt copy whether that permanent is tapped or untapped, whether it has any counters on it or any Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on

Because of these, some cards had to fall by the wayside

With any luck, players will hit at least one of the ACE SPEC cards , although the Secret cards might be harder to pull