Cheapest priced copy (Amonkhet): $5.99 at Card Kingdom, near mint, their price list as of .
Nest of Scarabs 
Enchantment · Uncommon · Amonkhet · #101
Whenever you put one or more -1/-1 counters on a creature, create that many 1/1 black Insect creature tokens.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $5.99 to $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Amonkhet | 101 | Uncommon | $5.99 | $17.99 |
2 rulings from Wizards of the Coast
- 18 April 2017If an effect has you put more -1/-1 counters on a creature than it has toughness, you’ll put all of those counters on it and create that many Insects, even if that makes its toughness a negative number.
- 18 April 2017If a creature with wither or infect deals damage to a creature, the controller of the creature with wither or infect puts that many -1/-1 counters on the second creature.