Cheapest priced copy (Planeshift): $0.49 at Card Kingdom, near mint, their price list as of .
Planeswalker's Mirth 
Enchantment · Rare · Planeshift · #12
{3}{W}: Target opponent reveals a card at random from their hand. You gain life equal to that card's mana value.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Planeshift | 12 | Rare | $0.49 | $2.99 |
One ruling from Wizards of the Coast
- 4 October 2004If the opponent has no cards in hand, then no life is gained.