Sunfury

The Sunfury is a Flail weapon obtained from Shadow Chests in The Underworld. It emits light when thrown, and can also set enemies on fire. Like other Flails, it is a ball-and-chain that swings outward, returns when its maximum distance is reached, is largely affected by gravity, and will continue to hang off the player if the attack button is held, causing damage to enemies that touch it.

Tips

 * With most Flails, excluding the Harpoon and Dao of Pow, you can trick most mobs into running into your flail. This can be done by throwing your flail from the top of a wall, and jumping behind it before it comes back. The flail will stick to the side of the wall, enemies will try to attack you, but hit the flail instead, and you won't be harmed.
 * The Sunfury is still relatively effective in Hardmode, dealing a good amount of damage and igniting enemies.