Cheapest priced copy (Outlaws of Thunder Junction): $0.35 at Card Kingdom, near mint, their price list as of .
Shackle Slinger 
Creature — Human Soldier · 3/2 · Uncommon · Outlaws of Thunder Junction · #65
Whenever you cast your second spell each turn, choose target creature an opponent controls. If it's tapped, put a stun counter on it. Otherwise, tap it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Outlaws of Thunder Junction | 65 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 12 April 2024Spells that were cast before Shackle Slinger entered the battlefield count. If Shackle Slinger was the first spell you cast this turn, the next spell you cast this turn is your second spell.