Ruby bolts (e)

Enchanted ruby bolts are adamant bolts tipped with ruby bolt tips, and enchanted. Ruby bolts can be enchanted through the spell Enchant Crossbow Bolt (Ruby) by a player with level 49 Magic. The spell enchants 10 ruby bolts at a time.

Enchanted ruby bolts are enchanted with the Blood Forfeit enchantment. This gives the bolts a chance of removing 10% of the attacker's Hitpoints to remove 20% of their target's Hitpoints, though it does not work if the attacker cannot spare the Hitpoints. Note that it removes 20% of the target's current hitpoints and 10% of the attacker's current hitpoints - for example, even if the target has 750 total hitpoints, if attacker has reduced its hitpoints down to 20 hitpoints and the ruby bolt (e)'s special occurs, it will only inflict 4 hitpoints, since this is 20% of 20. This same is true if the attacker is not at maximum hitpoints. This is especially effective against opponents with a high hitpoints level such as Black Dragons. These bolts are most often used in boss-hunting, especially against God Wars Dungeon bosses such as Kree'arra and Commander Zilyana.

Other Uses
Ruby bolts (e) are also used to defeat the Corporeal Beast with a high ranged level, although the attack will only hit for a maximum of 100, instead of the theoretical 400 hitpoints. Other opponents with a very large number of hitpoints against which the effect is useful include the avatars of Creation and Destruction from Soul Wars, as well as the Decaying avatar and Nomad from the quest Nomad's Requiem. These are also good for Ice Strykewyrms seeing as the have 300 hitpoints.