Cheapest priced copy (Journey into Nyx): $0.35 at Card Kingdom, near mint, their price list as of .
Tormented Thoughts 
Sorcery · Uncommon · Magic Origins · #122
As an additional cost to cast this spell, sacrifice a creature.
Target player discards a number of cards equal to the sacrificed creature's power.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Journey into Nyx | 86 | Uncommon | $0.35 | $0.49 |
| Magic Origins | 122 | Uncommon | $0.35 | $0.49 |
5 rulings from Wizards of the Coast
- 26 April 2014Players can only respond once this spell has been cast and all its costs have been paid. No one can try to destroy the creature you sacrificed to prevent you from casting this spell.
- 26 April 2014You must sacrifice exactly one creature to cast this spell; you cannot cast it without sacrificing a creature, and you cannot sacrifice additional creatures.
- 26 April 2014The targeted player will discard a number of cards equal to the power of the sacrificed creature as it last existed on the battlefield.
- 22 June 2015You must sacrifice exactly one creature to cast Tormented Thoughts. You can't cast it without sacrificing a creature, and you can't sacrifice additional creatures.
- 22 June 2015Players can only respond once this spell has been cast and all its costs have been paid. No one can try to destroy the creature you sacrifice to stop you from casting this spell.