Enchant Crossbow Bolt (Onyx) is a spell that allows Onyx bolts to be enchanted, making them Onyx bolts (e) and imbuing them with a special effect called Life Leech. Life Leech adds a chance to do extra damage to the target and restore Hitpoints to the player using them. This effect does not work on Undead creatures, as they have no life to leech.

You can experiment with the max hit of Onyx bolts (e) as well as any other Ranged equipment using our Ranged Max Hit calculator.

This spell is available at Magic level 87, giving 97 experience. It requires 1 Death rune, 1 Cosmic rune, and 20 Fire runes to cast.