Cheapest priced copy (Tempest): $0.35 at Card Kingdom, near mint, their price list as of .
Volrath's Curse 
Enchantment — Aura · Common · Tempest · #101
Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated. That creature's controller may sacrifice a permanent of their choice for that player to ignore this effect until end of turn.
{1}{U}: Return this Aura to its owner's hand.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tempest | 101 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 4 October 2004If the creature this card is on is sacrificed to this card, this card is put into the graveyard before the ability to unsummon it can be used.
- 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.