Cheapest priced copy (Tempest): $0.35 at Card Kingdom, near mint, their price list as of .
Interdict 
Instant · Uncommon · Tempest · #69
Counter target activated ability from an artifact, creature, enchantment, or land. That permanent's activated abilities can't be activated this turn. (Mana abilities can't be targeted.)
Draw a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tempest | 69 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 4 October 2004This card targets the ability, and not the permanent itself.
- 8 June 2016Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.