Shadowbeam

The Shadowbeam is a fairly overpowered weapon added in 1.2.

Shadowbeam
It seems like the shadowbeam at first would hurl shadowy blobs from it's description, but is much more powerful then that. It emits a beam of energy and the "Mythical" adjective is actually 2x weaker than an "intense" shadowbeam (tested on a server). Hard to believe right? Try to obtain 2 shadowbeams from necromancers in dungeons. They also have a piercing effect so they are good for taking at large chunks of Zombies and Possesed Armours in Blood Moons.

Obtaining and tips.
The shadowbeam has a high critical-hit ratio, so stay out of someone with a beams way, or face the consequences. Necromancers are really annoying to try and kill, because they have a habit of teleporting when you hit them, so I dare you to take a picture of 5 shadowbeams, while standing in a dungeon and post on the wiki.