Withering Boon

Oracle Text

As an additional cost to cast this spell, pay 3 life.

Counter target creature spell.

Card Rulings

11/1/2005 The payment of 3 life is an additional cost of casting the spell.
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.