Opal bolts (e)

Enchanted opal bolts are bronze bolts tipped with enchanted opal. Opal bolts can be enchanted into enchanted opal bolts through the spell Enchant Crossbow Bolt (Opal) by a player with level 4 Magic. The spell enchants 10 opal bolts at a time.

Enchanted opal bolts are enchanted with the Lucky Lightning enchantment, which gives a chance of a lightning bolt striking your opponent and causing 10% extra damage.

This effect can be triggered with auto attacks and abilities, with abilities consuming one bolt per activation.

The chance of the special attack occurring is increased upon the completion of the Elite Seers' Tasks.

Trivia

 * On 23 February 2010, a bug was leaked in which one could duplicate enchanted bolts but was patched on the same day. Many players were banned for using this glitch.
 * These bolts were untradeable when released, but a hidden update in 2007 made them tradeable.