Cheapest priced copy (Eldritch Moon): $0.35 at Card Kingdom, near mint, their price list as of .
Scour the Laboratory 
Instant · Uncommon · Eldritch Moon · #73
Delirium — This spell costs {2} less to cast if there are four or more card types among cards in your graveyard.
Draw three cards.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eldritch Moon | 73 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 13 July 2016If an effect allows you to cast Scour the Laboratory from your graveyard, count the number of card types among cards in your graveyard after moving Scour the Laboratory from your graveyard to the stack. If its delirium effect no longer applies, it costs {4}{U}{U} to cast.