flavorText: The Rubblefield was once among the wealthiest districts in Ravnica. All it took was a single wurm to reduce it to ruins.
name: Siege Wurm
originalText: Convoke (Each creature you tap while playing this spell reduces its cost by {1} or by one mana of that creature's color.)\nTrample
printings: GRN, M15, PLST, RAV, RVR
text: Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)\nTrample