KTK: Goblinslide, Enchantment 2R Whenever you cast a noncreature spell, you may pay {1}. If you do, create a 1/1 red Goblin creature token with haste.

Goblinslide

Whenever you cast a noncreature spell, you may pay 1. If you do, create a 1/1 red Goblin creature token with haste.

9/20/2014 You make the decision whether to pay as the ability resolves.