Cheapest priced copy (Darksteel): $0.49 at Card Kingdom, near mint, their price list as of .
Thought Dissector 
Artifact · Rare · Darksteel · #152
{X}, {T}: Target opponent reveals cards from the top of their library until an artifact card or X cards are revealed, whichever comes first. If an artifact card is revealed this way, put it onto the battlefield under your control and sacrifice this artifact. Put the rest of the revealed cards into that player's graveyard.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Darksteel | 152 | Rare | $0.49 | $0.79 |
One ruling from Wizards of the Coast
- 1 December 2004You put the artifact card onto the battlefield even if Thought Dissector has already left the battlefield and you can’t sacrifice it.