The Crescent Moon is a weapon obtained in Lunar Shadow.
The Crescent Moon seems to be a dark red hand-held gun with a grey handle.
The bullets can break certain blocks. Bullets fired while the Crescent Moon is at Level 2 will "explode" at the end of their path, scattering Level 1 bullets up, down, left and right. Bullets fired while the Crescent Moon is at Level 3 or MAX will also explode at the end of their path, but these scatter Level 2 bullets up, down, left and right, which will eventually explode as well, sending Level 1 bullets all over the place.
The Crescent Moon has two descriptions. The first is while Invidia is still in the inventory.
CRESCENT MOON: a weak gun, and not very useful. It's weaker than Invidia, but in an emergency, it might come in handy.The second is used if Invidia is removed from the inventory.
CRESCENT MOON: a weak gun that pierces certain blocks. It bears the mark of Lunaris, gunsmith of the Moon. Explodes.