Cheapest priced copy (Commander 2020): $0.35 at Card Kingdom, near mint, their price list as of .
Skullwinder 
Creature — Snake · 1/3 · Uncommon · Commander 2015 · #39
Deathtouch
When this creature enters, return target card from your graveyard to your hand, then choose an opponent. That player returns a card from their graveyard to their hand.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
8 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2015 | 39 | Uncommon | $0.49 | — |
| Commander 2020 | 189 | Uncommon | $0.35 | — |
| Commander Legends: Battle for Baldur's Gate | 256 | Uncommon | $0.35 | $0.49 |
| Commander Anthology | 146 | Uncommon | $0.49 | — |
| Modern Horizons 3 Commander | 247 | Uncommon | $0.35 | $0.49 |
| Outlaws of Thunder Junction Commander | 207 | Uncommon | $0.35 | — |
| The List | C20-189 | Uncommon | $0.39 | — |
| The List | CLB-256 | Uncommon | — | — |
6 rulings from Wizards of the Coast
- 4 November 2015Skullwinder's enters-the-battlefield ability targets only the card in your graveyard. If that card is an illegal target as the ability tries to resolve, the ability won't resolve and none of its effects will happen. No cards will be returned to any player's hand.
- 4 November 2015You choose the opponent as the ability is resolving. You may choose an opponent with no cards in their graveyard.
- 10 June 2022You may choose an opponent with no cards in their graveyard. In that case, they will not get to return anything.
- 10 June 2022The chosen opponent gets to choose which card to return from their graveyard to their hand.
- 10 June 2022Skullwinder's enters-the-battlefield ability targets only the card in your graveyard. If that card is an illegal target as the ability tries to resolve, the ability won't resolve and none of its effects will happen. No cards will be returned to any player's hand.
- 10 June 2022You choose the target card as you put Skullwinder's triggered ability on the stack, but you don't choose an opponent until after you have returned the card to your hand.