SO, this is a relatively quick and simple mod. But sometimes even the simple mods get good ratings if the concept is there. I thought this would be a good idea, and I hope you guys like it!
Modloader supported! (Required).

This mod adds katana swinging Ninjas to the game! :D The ninjas only come out at night, and are quite a bit faster than you! (As you can probably see in the video) They have relatively similar properties as a human (Same health and sound effects) other than the fact that they can sprint, jump, and swim like a NINJA! These Ninjas will make quick work of you with their lightning fast moves with their katana! (Kills you in roughly 2 hits, 5 whole hearts damage per hit with the katana.)

Katanas can be acquired with TMI or similar, but cannot be crafted as of now.

Enjoy!

Credit to Deedee 562 for the idea.

Due to a recent HDD crash, this mod's source code have been lost. (All of my files have been lost, actually.)
As a result, I will no longer be able to update this mod. So stop asking me to. I'll leave this here in case you want to play it on the old version upon which it will remain forever. If you know how to code, you have my permission to recreate this mod for the current version. Thank you, and I'm truly sorry.