Cheapest priced copy (Fifth Dawn): $18.99 at Card Kingdom, near mint, their price list as of .
Plunge into Darkness 
Instant · Rare · Fifth Dawn · #57
Choose one —
• Sacrifice any number of creatures. You gain 3 life for each creature sacrificed this way.
• Pay any amount of life, then look at that many cards from the top of your library. Put one of those cards into your hand and exile the rest.
Entwine {B} (Choose both if you pay the entwine cost.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $18.99 to $99.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 57 | Rare | $18.99 | $99.99 |
2 rulings from Wizards of the Coast
- 1 December 2004Assuming the entwine cost has been paid, the effect is (1) sacrifice any number of creatures, (2) gain 3 life for each sacrificed creature, (3) choose X, (4) pay X life, and (5) look at the top X cards of your library, put one into your hand, and exile the rest.
- 1 December 2004Everything other than the mode/entwine choice (and paying the {1}{B}, of course) is done on resolution.