Cheapest priced copy (Core Set 2020): $0.79 at Card Kingdom, near mint, their price list as of .
Blightbeetle 
Creature — Insect · 1/1 · Uncommon · The List · #M20-87
Protection from green (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything green.)
Creatures your opponents control can't have +1/+1 counters put on them.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.79 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2020 | 87 | Uncommon | $0.79 | $7.99 |
| The List | M20-87 | Uncommon | $0.99 | — |
4 rulings from Wizards of the Coast
- 12 July 2019Creatures your opponents control won’t receive +1/+1 counters as they enter the battlefield.
- 12 July 2019Blightbeetle doesn’t remove any +1/+1 counters already on creatures your opponents control.
- 12 July 2019If the cost of an ability or an additional cost of a spell requires putting +1/+1 counters on a creature affected by Blightbeetle, that cost can’t be paid. If a resolving spell or ability says that a player may put +1/+1 counters on that creature, that player can’t choose to do so.
- 12 July 2019If a replacement effect allows a player to modify or replace an event by putting +1/+1 counters on a creature affected by Blightbeetle, that player may apply that replacement effect, but they won’t get counters. If the original event is entirely replaced (such as by applying Vigor’s replacement effect), the entire original event simply doesn’t happen.