Magic stone

Magic stone, also called magical stone, was a transmutation or enchantment spell that turned some nearby stones into projectiles.

Effects
Up to three small stones no larger than sling bullets could be enchanted to become magical projectiles that could be used in a ranged attack. The dweomer lasted 30 minutes before the pebbles reverted back to normal. Whomever used the stones had to make a normal range attack, either by throwing or slinging, but with the added bonus due to the magic on the stones, it was a bit easier and worked on targets that only magic weapons could strike. The transmuted bullets were particularly effective against undead, potentially doing double damage.

Components
Verbal and somatic components and the caster's holy symbol or divine focus were required, plus the three stones. The enchantment version of this spell required the pebbles be untouched by tool or magic as a prerequisite.