Invasion of Lorwyn // Winnowing Forces

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When this Siege enters, destroy target non-Elf creature an opponent controls with power X or less, where X is the number of lands you control. -

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Winnowing Forces's power and toughness are each equal to the number of lands you control.

The Phyrexian appearance was so offensive that perfects and eyeblights worked together in unprecedented kinship to destroy them.

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