Siege Wurm [Guilds of Ravnica]

Set: Guilds of Ravnica Type: Creature — Wurm Common Cost: {5}{G}{G} 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.) Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Suddenly, all the haggling didn't seem so important.