This sample spell struck me as perfect for Conan-esque pulp fantasy:
Clutch of Nyogtha
[Force]
Components: V, S
Cost: 2 Str (+1 Str/round) damage and 1d20 Sanity points
Casting Time: 1 action
Range: Medium (100 ft. + 10 ft./level)
Target: One living creature
Duration: Concentration (see text)
Saving Throw: Will negates (see text)
You create a magic force that grips the subject's heart (or similar vital internal organ) and begins crushing it. The victim appears to be having a heart attack; he is paralyzed and takes 1d3 points of damage per round. Each round, you must concentrate and take another point of Strength damage to maintain the spell. In addition, a conscious victim gains a new saving throw each round to stop the spell. If the victim dies as a result of this spell, his chest ruptures and bursts, and his smoking heart appears in your hand.
Clutch of Nyogtha
[Force]
Components: V, S
Cost: 2 Str (+1 Str/round) damage and 1d20 Sanity points
Casting Time: 1 action
Range: Medium (100 ft. + 10 ft./level)
Target: One living creature
Duration: Concentration (see text)
Saving Throw: Will negates (see text)
You create a magic force that grips the subject's heart (or similar vital internal organ) and begins crushing it. The victim appears to be having a heart attack; he is paralyzed and takes 1d3 points of damage per round. Each round, you must concentrate and take another point of Strength damage to maintain the spell. In addition, a conscious victim gains a new saving throw each round to stop the spell. If the victim dies as a result of this spell, his chest ruptures and bursts, and his smoking heart appears in your hand.