Enchanted onyx bolts are runite bolts tipped with enchanted onyx. Onyx bolts can be enchanted through the spell Enchant Crossbow Bolt (Onyx) by a player with level 87 Magic. The spell enchants 10 onyx bolts at a time. These bolts are rarely used due to their cost (7,712 coins per bolt) which exceeds the cost of Enchanted dragonstone bolts by about 7392 coins, but are frequently high alched.
Enchanted onyx bolts have a Life leech special. This gives the bolts a chance of doing extra damage (20-25% chance from testing) and healing the attacker's Life Points by 25% of the damage dealt. This effect does work with abilities. This does not work on the undead, as they have no "life" to leech.
Note: The chance of this effect occurring increases as you complete the Seer's Tasks.
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- For an exhaustive list of all known sources for this item, see here.