Bone Splinters — ruling 1

You must sacrifice exactly one creature to cast this spell; you can’t cast it without sacrificing a creature, and you can’t sacrifice additional creatures.

Bone Splinters — ruling 2

Once you begin to cast Bone Splinters, no player may take actions until you’re done. Notably, opponents can’t try to remove the creature you wish to sacrifice.

Bone Splinters : règles, fonctionnement et interactions (MTG)

Bone Splinters is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

As an additional cost to cast this spell, sacrifice a creature. Destroy target creature.

How it works : Bone Splinters

Original English text — Wizards of the Coast / Scryfall

#1September 9, 2022· Wizards of the Coast
You must sacrifice exactly one creature to cast this spell; you can’t cast it without sacrificing a creature, and you can’t sacrifice additional creatures.
No other card is named in this ruling.
#2September 9, 2022· Wizards of the Coast
Once you begin to cast Bone Splinters, no player may take actions until you’re done. Notably, opponents can’t try to remove the creature you wish to sacrifice.
No other card is named in this ruling.