Cheapest priced copy (Pro Tour Collector Set): $0.35 at Card Kingdom, near mint, their price list as of .
Erhnam Djinn 
Creature — Djinn · 4/5 · Uncommon · Mystery Booster 2 · #133
At the beginning of your upkeep, target non-Wall creature an opponent controls gains forestwalk until your next upkeep. (It can't be blocked as long as defending player controls a Forest.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
14 printings · $0.35 to $799.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Arabian Nights | 48 | Rare | $799.99Out of stock | — |
| Anthologies | 54 | Uncommon | $1.29 | — |
| Chronicles Foreign Black Border | 64 | Uncommon | — | — |
| Beatdown Box Set | 54 | Uncommon | — | $0.59 |
| Chronicles | 64 | Uncommon | $0.99 | — |
| Judgment | 113 | Rare | $0.49 | $8.99 |
| Mystery Booster 2 | 133 | Uncommon | $0.39 | — |
| Oversized League Prizes | 8 | Rare | — | — |
| Oversized League Prizes | 9 | Rare | — | — |
| Pro Tour Collector Set | bl64 | Uncommon | $0.35 | — |
| Pro Tour Collector Set | et64 | Uncommon | $0.35 | — |
| Pro Tour Collector Set | gb64 | Uncommon | $0.35 | — |
| Pro Tour Collector Set | pp64 | Uncommon | $0.39 | — |
| Rinascimento | 118 | Uncommon | — | — |
3 rulings from Wizards of the Coast
- 4 October 2004If you have more than one Djinn, you can have all of them target the same creature with their ability.
- 4 October 2004In multiplayer games you can choose a different player's creature each upkeep. You are forced to pick a creature that some opponent controls if there is at least one creature on the battlefield that is a legal target.
- 4 October 2004If there are no creatures your opponent controls to target at the beginning of your upkeep, ignore this ability.