Invasion of Lorwyn // Winnowing Forces - March of the Machine - 236

Battle — Siege

Mana Cost: {4}{B}{G}

(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.

Uncommon · March of the Machine · #236 (MOM)

Illustrated by Dan Murayama Scott