Cheapest priced copy (March of the Machine): $0.35 at Card Kingdom, near mint, their price list as of .
Herbology Instructor // Malady Invoker 
Creature — Treefolk Druid // Creature — Phyrexian Treefolk · 1/3 · Uncommon · March of the Machine · #189
When this creature enters, you gain 3 life.
{6}{B/P}: Transform this creature. Activate only as a sorcery. ({B/P} can be paid with either {B} or 2 life.)
When this creature transforms into Malady Invoker, target creature an opponent controls gets -0/-X until end of turn, where X is this creature's power.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 189 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 14 April 2023Use Malady Invoker’s power as its ability resolves to determine the value of X. If Malady Invoker is no longer on the battlefield at that time, use its power when it was last on the battlefield.