Enchant Crossbow Bolts (Ruby) requires a Magic level of 49. It imbues 10 Ruby bolts each cast and turns them into Ruby bolts (e), which gives the effect Blood Forfeit. These bolts have a chance of removing 20% hitpoints from your opponent, while sacrifing 10% of your Hitpoints. These bolts are mainly useful against creatures like TzTok-Jad and God Wars Dungeon bosses, as they have very high hitpoints and bring them down faster than normal. If you use these to kill players or normal creatures, it won't have that great of an effect, and can be surpassed by other bolts for better damage output.