Cheapest priced copy (Mirrodin): $0.59 at Card Kingdom, near mint, their price list as of .
Psychogenic Probe 
Artifact · Rare · Mirrodin · #231
Whenever a spell or ability causes a player to shuffle their library, this artifact deals 2 damage to that player.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.59 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 231 | Rare | $0.59 | $3.99 |
One ruling from Wizards of the Coast
- 1 February 2009This ability will trigger even if the player’s library is empty at the time they are supposed to shuffle it.