Sorcery, B (1)
Common
As an additional cost to cast Bone Splinters, sacrifice a creature.
Destroy target creature.
"Which do you deserve, the heft of a femur or the graceful sharpness of a forearm? Decisions, decisions . . ."
—Gisa the Mad
Illus. Nils Hamm

10/1/2008: You could choose to target the creature you're going to sacrifice to pay for Bone Splinters. First you choose the target (at which time it's still on the battlefield), then you pay the costs (at which time you sacrifice it). The spell will be countered.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern