Brinefang

The Brinefang is a non-consumable Hardmode throwing weapon that has a chance to be dropped by Duke Fishron. Each use throws an aquatic fang that is not affected by gravity. Each aquatic fang is accompanied by two water surges, which twist along the fang before firing out at an angle, homing in on nearby enemies.

Like most non-consumable throwing weapons, using this weapon builds up an exhaustion meter that appears below the player. Not using the weapon will make the meter slowly go back down. However, if it becomes completely filled, the user will be inflicted with the Exhaustion debuff, causing all non-consumable throwing weapons to deal massively decreased damage for some time. The meter resets after the debuff ends.