Light Disc

The Light Disc is a Hardmode boomerang-type weapon that deals Melee damage. Up to a total of five Light Discs can be crafted and stacked in a single slot, which allows them to be rapid-fired by holding the attack button, with multiple discs in the air at once. Light Discs are quicker than other Boomerangs, and can ricochet any number of times(they automatically return after about two seconds, though).

Light Disc physics are similar to the Thorn Chakram, though they have nearly twice the range and don't "wobble" as they travel. They also emit a small amount of light, comparable to the glow of Demonite or Crystal Shards.

Light Disc throws occur rapidly enough, and with enough potential range, that all five discs can easily be in the air at once. Throwing a full stack of five discs takes approximately one second in total. If the attack button is held, the first disc is thrown again the moment it returns, which at full range occurs approximately .75 seconds after the last disc is away -- meaning that there is a slight pause after 5 throws before the next volley can begin.

Light Discs cannot have Modifiers through any usual in-game means, due to their stackable nature. They can only be assigned Modifiers through use of an inventory editor.

Tips

 * A full stack of five Light Discs is very useful for cave exploration and gathering drops from underground enemies. Its continuous ricocheting fire, long range, and ability to have five projectiles in the air at once, along with the lack of any ammo consumption, mean that the fire key can be held continuously during travel to maintain a rather large spread "field" of indefinite fire with relatively little need to aim.
 * A full stack of Light Discs can be very effective when fighting monsters in small areas or rooms.

Trivia

 * This weapon is a reference to the Identity Discs in the movies Tron (1982) and Tron: Legacy (2010).
 * Upon entering the map function of the console version of Terraria, a small Light Disc will briefly appear as the loading icon.