Let that sink in for a moment
Its looking like a strong possibility that this format will involve the graveyard enough that people will be forced to attack it with their sideboards, so its nice that our other two main payoff cards do not require the graveyard

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That seems like it might be too powerful
The goal of any match is generally to get your opponent's life down to 0 but there are many "win conditions" in Magic: The Gathering that define how you should play
Counters and other effects that modify Duplicant's power and toughness still apply