Bonemerang

The Bonemerang is a Dungeon Bow. Its item ability fires a bone projectile which deals arrow damage on hit, and returns to the user like a boomerang. It requires The Catacombs - Floor IV completion to use.

Crafting

 * Requirements
 * 5 Spirit Bones
 * 10 Enchanted Bone Blocks
 * 15 Enchanted String

Essence Crafting
This bow can be upgraded with a Wither Essence.

Usage
The Bonemerang is a unique type of bow as it acts like a boomerang. Firing a Bonemerang launches a bone that travels forward for up to 13.5 blocks before returning. The bone deals arrow damage, benefits from bow enchantments and can trigger, but doesn't deal knockback. When it's returning, it deals double damage.

While in dungeons, the bone benefits from the Bouncy Arrows and Double Arrows perk, meaning it has a chance to summon arrows that inherit the Bonemerang's damage.

If the Bonemerang hits a wall or strikes more than 10 enemies, the bone shatters, rendering it unusable for 3 seconds. While the bone is flying and/or shattered, a ghast tear takes its place in the inventory. Other Bonemerangs may be fired when one is unusable.

If the Bonemerang item is not held when its respective projectile strikes an enemy, its damage is greatly reduced and the double damage from returning projectiles does not apply. It is unknown if this is intended or a bug.

When the bone is returning, it will try to return to its thrower as they move, causing the bone's trajectory to follow its thrower while moving.

Trivia

 * The Bonemerang is a reference to Marowak's signature move in Pokémon.
 * Sword runes can be applied to Bonemerangs.
 * When returning to the user, it can move 20 blocks before disappearing.
 * Throwing a Bonemerang at Thorn stuns him for 3–5 seconds, making it easier to shoot him with the Spirit Bow.
 * If Thorn is unstunned, he will begin to move very fast, making it very hard to shoot him.