Cheapest priced copy (New Capenna Commander): $1.49 at Card Kingdom, near mint, their price list as of .
Boxing Ring 
Artifact · Rare · New Capenna Commander · #99
Whenever a creature you control enters, it fights up to one target creature you don't control with the same mana value.
{T}: Create a Treasure token. Activate only if you control a creature that fought this turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $1.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Capenna Commander | 91 | Rare | $1.49 | $2.49 |
| New Capenna Commander | 99 | Rare | $1.79 | $1.49 |
2 rulings from Wizards of the Coast
- 29 April 2022You may activate Boxing Ring's last ability if you control a creature that fought due to any effect, not just a creature that fought in the Boxing Ring.
- 29 April 2022If the only creature you controlled that fought this turn died due to that fight, you can't activate Boxing Ring's last ability. Only winners get prizes!