Cheapest priced copy (Foundations Jumpstart): $0.49 at Card Kingdom, near mint, their price list as of .
Thieves' Guild Enforcer 
Creature — Human Rogue · 1/1 · Rare · Foundations Jumpstart · #493
Flash
Whenever this creature or another Rogue you control enters, each opponent mills two cards.
As long as an opponent has eight or more cards in their graveyard, this creature gets +2/+1 and has deathtouch.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 493 | Rare | $0.49 | — |
| Core Set 2021 | 125 | Rare | $0.49 | $0.79 |
| Core Set 2021 | 361 | Rare | $1.49 | $1.99 |
| Core Set 2021 Promos | 125p | Rare | $2.29 | $2.49 |
| Core Set 2021 Promos | 125s | Rare | — | $1.79 |
2 rulings from Wizards of the Coast
- 23 June 2020If Thieves' Guild Enforcer gains deathtouch only after dealing damage (most likely because another creature was dealt lethal damage at the same time that Thieves' Guild Enforcer dealt damage), the damage it dealt won't be from a source with deathtouch.
- 23 June 2020Thieves' Guild Enforcer gets +2/+1 just once, no matter how many opponents have eight or more cards in their graveyard and no matter how many cards they have past the eighth.