Magic Missile

The Magic Missile is a magic weapon found in the Dungeon's Gold Chests. It fires a projectile that follows the player's cursor, and if the trigger is held, continues following it until colliding with an enemy or object. When the attack button is released while holding the Missile still, it re-fires in the direction it is facing from the player; but if its dragged to a particular direction, it will follow it. It is high in damage, but expensive in Mana.

Trivia

 * Magic Missile is based on the spell of the same name from the Dungeons and Dragons Pencil-and-Paper Role Playing Game. In certain editions of 'D&D', Magic Missile does not miss as long as the caster has line-of-sight to the target, which likely inspired the Terraria spell's 'remote-control' behavior.
 * The Magic Missile is technically more Mana-efficient than the Flamelash.