Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Battle-Rattle Shaman 
Creature — Goblin Shaman · 2/2 · Uncommon · Foundations · #533
At the beginning of combat on your turn, you may have target creature get +2/+0 until end of turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
10 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 116 | Common | $0.35 | $0.49 |
| Battlebond | 166 | Uncommon | $0.35 | $0.49 |
| Archenemy: Nicol Bolas | 40 | Common | $0.35 | — |
| Foundations | 533 | Uncommon | $0.35 | — |
| Iconic Masters | 117 | Common | $0.35 | $0.49 |
| Foundations Jumpstart | 128 | Common | $0.35 | — |
| Core Set 2021 | 130 | Uncommon | $0.35 | $0.49 |
| Modern Masters 2017 | 89 | Common | $0.35 | $0.49 |
| The List | E01-40 | Common | $0.35 | — |
| Rise of the Eldrazi | 136 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 14 March 2017If a spell or ability causes your turn to have multiple combat phases, Battle Rattle Shaman's ability triggers during each of them.
- 14 March 2017Battle-Rattle Shaman's ability triggers when the beginning of combat step starts during each of your turns. It resolves before you declare attackers.