Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Anointer of Valor 
Creature — Angel · 3/5 · Common · Jumpstart 2022 · #148
Flying
Whenever a creature attacks, you may pay {3}. When you do, put a +1/+1 counter on that creature.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 6 | Common | $0.35 | $0.49 |
| Commander Legends | 8 | Common | $0.35 | $0.49 |
| Jumpstart 2022 | 148 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 10 November 2020Anointer of Valor's triggered ability triggers when any creature attacks any player or planeswalker.
- 10 November 2020If you choose to pay {3}, a second triggered ability triggers. Players may respond to that reflexive triggered ability before the +1/+1 counter is put on the creature.
- 10 November 2020You can't pay {3} more than once to put more than one +1/+1 counter on the attacking creature.