Here are a few magical bows I created recently. Comments welcome.

Bow of Newyth

Nearly 900 years ago, this weapon was created by the elves of the Coullabhie
as a mode of prevention against the Vampire. The long bow, which is made of
platinum, has a bonus of +2 using normal arrows. However, if the cord is drawn
back, a bone arrow with a barbed, mithril tip appears. These arrows are
Vampire Slayers, arrows that seek out the heart of the vampire and impales
him. The item is charged, however and can only be used fifteen more times
before it loses its enchantment. This long bow is the reason the elves do not
fear the Vampire.

Daegendal's Long Bow

This weapon was the personal bow of High Lord Daegendal of Rhuannach, before
his death in 2010 MA. The bow is made of cedar wood, and is strung with a
cotton string. It has a bonus of +1 when using normal arrows. However, it also
has the power that when the string is pulled back, a bone arrow with a silver
tip appears. When these arrows strike a target, they become the center for a
10 HD Fireball. This item is charged, and can only be used 27 more times. It
can be recharged by having a 10th level mage cast Fireball into the bow.
Currently the bow is in the hands of Quevven ibn Corina (M½E; F/W 9/10; Ba,
minor 17; LG) who is currently looking for adventure in the Imperial City of
Anuire.

Bow of Thunder

This short bow was created as the High Lady's companion to Daegendal's Bow.
This bow is made of pine wood, and is strung with a cotton string. This bow
has a bonus of +1, but when the string is drawn back, an arrow of copper with
an electrum tip appears. When these arrows strike a target, it becomes the
focal point of a 10 HD Lightning Bolt. This item is charged and can be used 86
more times. It can be recharged by having Lightning Bolt cast by a 10th level
mage into the bow. It is currently in the hands of Quarra bint Corina (F½E;
Pr/T 5/5, Leira; Ba, minor 11; NG) who is traveling with her brother in the
Imperial City.