Cheapest priced copy (Khans of Tarkir): $0.35 at Card Kingdom, near mint, their price list as of .
Goblinslide 
Enchantment · Uncommon · Khans of Tarkir · #109
Whenever you cast a noncreature spell, you may pay {1}. If you do, create a 1/1 red Goblin creature token with haste.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Khans of Tarkir | 109 | Uncommon | $0.35 | $0.99 |
| The List | KTK-109 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 20 September 2014You make the decision whether to pay {1} as the ability resolves.