That's only because you've got a problem in your visualization chip.
Allow me to help you reboot.
The proper way to describe the scene is not:
"The fighter attacks, swinging once, and misses. He stands there waiting for you to act. You take a step away, and cast Finger of Death at him. He dies."
A better way is:
"The warrior charges you, his greatsword darting about, seeking your flesh. You parry once, twice, three times with your staff, and the final block is enough to take his greatsword out of line. You push forward, momentarily, your staff across his chest, and he stumbles, momentarily out of balance. Seizing the opportunity, you scramble back over the small stones at your heels and pull the skeletal finger from the band of your belt. You point, say the magic words, and a crackling beam of dark energy leaps from your hand, striking him in the heart. In your mind, you hear his heart stop, instantly, and you know before the warrior does that he is eneffably dead."