Cheapest priced copy (Modern Horizons 2): $0.59 at Card Kingdom, near mint, their price list as of .
Bone Shards 
Sorcery · Common · Modern Horizons 2 · #76
As an additional cost to cast this spell, sacrifice a creature or discard a card.
Destroy target creature or planeswalker.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.59 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 2 | 76 | Common | $0.69 | $0.79 |
| Modern Horizons 2 | 395 | Common | $0.59 | $0.79 |
| The List | MH2-76 | Common | $0.59 | — |
2 rulings from Wizards of the Coast
- 18 June 2021Once you begin to cast Bone Shards, no player may take actions until you're done. Notably, opponents can't try to remove the creature you wish to sacrifice or make you discard your last card.
- 18 June 2021You must sacrifice exactly one creature or discard exactly one card to cast this spell; you can't cast it without sacrificing a creature or discarding a card, and you can't sacrifice additional creatures or discard additional cards.