Cheapest priced copy (Outlaws of Thunder Junction Commander): $1.99 at Card Kingdom, near mint, their price list as of .
Breena, the Demagogue 
Legendary Creature — Bird Warlock · 1/3 · Mythic · Secrets of Strixhaven Commander · #298
Flying
Whenever a player attacks one of your opponents, if that opponent has more life than another of your opponents, that attacking player draws a card and you put two +1/+1 counters on a creature you control.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
6 printings · $1.99 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2021 | 1 | Mythic | — | $2.99 |
| Commander 2021 | 328 | Mythic | $19.99 | — |
| Commander 2021 Display Commanders | 1 | Mythic | — | — |
| Outlaws of Thunder Junction Commander | 217 | Mythic | $1.99 | — |
| The List | OTC-217 | Mythic | — | — |
| Secrets of Strixhaven Commander | 298 | Mythic | $1.99 | — |
3 rulings from Wizards of the Coast
- 16 April 2021You choose which creature to put +1/+1 counters on as the ability is resolving. Once you make the choice, no player may take actions until the counters are placed.
- 16 April 2021If the attacking player is one of your opponents and has less life than the player being attacked, then the condition is satisfied.
- 16 April 2021Breena's triggered ability will trigger even if you control no creatures.