Cheapest priced copy (Phyrexia: All Will Be One Commander): $4.49 at Card Kingdom, near mint, their price list as of .
Roar of Resistance 
Enchantment · Rare · Phyrexia: All Will Be One Commander · #53
Creature tokens you control have haste.
Whenever one or more creatures attack, you may pay {1}{R}. If you do, creatures attacking your opponents and/or planeswalkers they control get +2/+0 until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $4.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Phyrexia: All Will Be One Commander | 15 | Rare | $4.49 | — |
| Phyrexia: All Will Be One Commander | 53 | Rare | $4.99Out of stock | — |
One ruling from Wizards of the Coast
- 4 February 2023Roar of Resistance's last ability triggers whenever any creatures attack, not just whenever creatures you control attack.