Heyo, Thought I'd Give a data pack Jam a try! (So Unfortunately no video as Editing would take too long, Sorry!!! D:)

Really Liked the theme for this one and so I welcome you to "The Shadowlings"

In this Data pack During(any time you can sleep) the night there is a chance one of 4 Shadowlings can spawn anywhere around you. (See Pictures)
And each has its own quirk!

• The Shadow Walker is Stronger.
• The Shadow Crawler is Faster.
• The Shadow Sniper is Kind of Invisible. (particles and bow are how you see it)
• The Shadow Glider is a Phantom so it's already annoying :)

Plus each of them has a chance to drop a custom Item when killed!