Cheapest priced copy (Morningtide): $0.35 at Card Kingdom, near mint, their price list as of .
Weed-Pruner Poplar 
Creature — Treefolk Assassin · 3/3 · Common · Morningtide · #83
At the beginning of your upkeep, target creature other than this creature gets -1/-1 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Morningtide | 83 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 April 2008The ability is mandatory. If you’re the only player who controls any other creatures, you must target one of your own creatures with the ability.