What does Hidden Dragonslayer do?
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Lifelink\nMegamorph {2}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)\nWhen Hidden Dragonslayer is turned face up, destroy target creature with power 4 or greater an opponent controls.
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