Crystal Bullet

Crystal Bullets are a Hardmode ammunition item. They shatter on impact with an enemy or solid block, splitting into three small shards that have limited range and deal 60% of the original bullet's damage.

Tips

 * If you can craft a lot of them (at least five full stacks, or 1250 bullets total) and have access to the Megashark, Crystal Bullets are generally the quickest way to beat The Twins and Skeletron Prime. Many of their secondary shards tend to hit (even a single Twin) for multiple hits per shot and the highest possible damage rate (The Destroyer seems to take more damage from Holy Arrows, or the Magical Harp if available). Pre-Hardmode Bosses, including the Wall of Flesh, can be killed in seconds with the Megashark/Crystal Bullets.
 * Crystal bullets are useful in killing the Dungeon Guardian or Skeletron Prime once night turns to day. This is because the defense of both the bosses are very high (9999 maximum) and will cause any attack to deal 1 or 2(critical) damage; the shards will each count as an individual projectile, racking up damage faster.