Cheapest priced copy (The Brothers' War): $0.39 at Card Kingdom, near mint, their price list as of .
Skyfisher Spider 
Creature — Spider · 3/3 · Uncommon · The Brothers' War · #221
Reach
When this creature enters, you may sacrifice another creature. When you do, destroy target nonland permanent.
When this creature dies, you may gain 1 life for each creature card in your graveyard. If you do, exile this card from your graveyard.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.39 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow Commander | 261 | Uncommon | $0.49 | — |
| The Brothers' War | 221 | Uncommon | $0.39 | $0.49 |
2 rulings from Wizards of the Coast
- 14 October 2022Notably, this means that players won't get to know what nonland permanent you plan to target before you choose whether to sacrifice a creature.
- 14 October 2022Skyfisher Spider's first triggered ability doesn't have any targets. If you choose to sacrifice another creature, a second triggered ability (called a "reflexive" triggered ability) goes on the stack and you choose a target nonland permanent at that time. Players may respond to that second ability as normal.