Let's make apprentice created enchantments

[ironboundtome]

The Marksman's Bow

A beautifully carved and crafted bow of ash and yew, which is enchanted so that arrows fired are unerringly directed by the bowman. When activated by command word arrows can travel as far as the bowman can see, and cannot miss, but are also resisted by MR. When activated the arrows inflict +10 damage. Bow shape grants a lab bonus of +5 for "destroying things at a distance".

Rego Herbam 15 (Base 3, +3 Sight)(+5 levels for 24 uses a day)

Could also be written up as ReHe10 and created as a potion if vis was an issue and campaigns do not tend to have frequent battles.