Withering Boon | Magic: The Gathering
Formats Withering Boon is Legal in
Official Oracle Text for Withering Boon
Counter target creature spell.
—Panya, Granger Guildmage
Official Rulings for Withering Boon
4/1/2008 : A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.