The Silver Bolt 'Stone-biter' (6d5) (+20,+15)
This crossbow bolt has a silver tip, blessed by the Valar for fighting
Wherever it strikes, this silver-tipped bolt eats through rock and metal
as easily as through flesh. The dwarf-smith who crafted Stone-biter also
inscribed the shaft with powerful doom-spells against the orcs and trolls
who had destroyed his ancestral home.
It increases your searching, infravision, ability to tunnel and luck
by 3. It does extra damage from acid. It is especially deadly
against orcs. It is especially deadly against trolls. It allows you
to sense the presence of orcs and trolls. It cannot be harmed by
acid, cold, lightning or fire.
Level 55, Rarity 30, 0.2 lbs, 50000 Gold

(T.o.M.E. 2.3.5)