Cheapest priced copy (Modern Horizons): $0.49 at Card Kingdom, near mint, their price list as of .
Plague Engineer 
Creature — Phyrexian Carrier · 2/2 · Rare · The List · #MH1-100
Deathtouch
As this creature enters, choose a creature type.
Creatures of the chosen type your opponents control get -1/-1.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $0.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 1 Timeshifts | 14 | Rare | — | $1.49 |
| Modern Horizons | 100 | Rare | $0.49 | $1.99 |
| The List | MH1-100 | Rare | $0.49 | — |
| Secret Lair Drop | 1215 | Rare | — | $4.99 |
2 rulings from Wizards of the Coast
- 14 June 2019You must choose an existing creature type, such as Sliver or Warrior. Card types such as artifact, and supertypes such as legendary or snow, can’t be chosen.
- 14 June 2019The choice of creature type is made as Plague Engineer enters the battlefield. Players can’t respond to this choice. The -1/-1 effect starts applying immediately.