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The same is true if a prepared creature becomes a copy of something else, even if it's then a permanent without a prepare spell
Then, the only thing that you need to do to make the card work with the other trap cards is to have the subtype.
Not only does this synergize well with "edicts" ways to force your opponents to kill their own stuff but Mazirek also capitalizes off of cards that sacrifice themselves such as lands like Evolving Wilds, or Saga enchantments