How can you use brutal arrows in runescape?

Answer 1

Brutal arrows can only be fired from composite ogre bows which are only available to players who have gone far enough into the Zogre Flesh Eaters quest. Grish will show you how to make a composite ogre bow from an Achey log and wolf bones.

Answer 2

You use the poison (a potion of weapon poison, weapon poison+, etc.) on an arrow.

Answer 3

you can purchase the knowledge to make brutal arrows and bolts through any slayer master once you have received the right amount of slayer points