Cheapest priced copy (Avatar: The Last Airbender): $0.35 at Card Kingdom, near mint, their price list as of .
Dragonfly Swarm 
Creature — Dragon Insect · */3 · Uncommon · Avatar: The Last Airbender · #215
Flying, ward {1} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)
This creature's power is equal to the number of noncreature, nonland cards in your graveyard.
When this creature dies, if there's a Lesson card in your graveyard, draw a card.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Avatar: The Last Airbender | 215 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 2 October 2025Dragonfly Swarm's triggered ability checks if there is a Lesson card in your graveyard when it is put on the stack and again when it goes to resolve. If there is no Lesson card in your graveyard when Dragonfly Swarm dies, the ability will not be put on the stack at all.