Seeking Mote

This spell creates a tiny, bright speck of light in one of the caster's hands (or in his mouth or emerging from his forehead, or one of his eyes, as needed). It flashes off to strike at a single chosen target, turning and twisting to follow them as does a wizard's magic missile spell. However, a seeking mote can miss. It can also be destroyed by a successful dispel magic spell or by a magical barrier en route to its target, but otherwise flies to attack a designated target in range, striking once with the caster's THAC0 but at a +4 bonus, and inflicting 2d4+2 points of damage.

The material components are a pinch of dust and a fleck of mica, quartz, or any sort of clear gemstone. Both ingredients must have previously been exposed to full sunlight for at least one continuous turn.