Cheapest priced copy (Commander 2021): $4.49 at Card Kingdom, near mint, their price list as of .
Battlemage's Bracers 
Artifact — Equipment · Rare · Commander 2021 · #48
Equipped creature has haste.
Whenever an ability of equipped creature is activated, if it isn't a mana ability, you may pay {1}. If you do, copy that ability. You may choose new targets for the copy.
Equip {2}
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2021 | 48 | Rare | $4.49 | — |
| Commander 2021 | 375 | Rare | $4.49 | — |
5 rulings from Wizards of the Coast
- 16 April 2021If the ability has {X} in its activation cost, the copy has the same value of X.
- 16 April 2021If the ability is modal (that is, it has a bulleted list of modes), the copy will have the same mode(s). You can’t choose new ones.
- 16 April 2021The copy will have the same targets as the ability it’s copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can’t choose a new legal target, then it remains unchanged (even if the current target is illegal).
- 16 April 2021Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keyword abilities (such as boast) are activated abilities and will have colons in their reminder text. An activated mana ability is one that produces mana as it resolves, not one that costs mana to activate.
- 16 April 2021Copying abilities doesn’t cause magecraft abilities to trigger.