Any mods that add random hostile to game?

[Izzy248]

I was just thinking that it would be cool if there were any mods that added a random hostile to the game, doesnt an preferably isnt another giant boss, but a normal sized mob that would be a surprise to encounter. Its fun going against hordes of spiders, occasional hounds and MacTusk but I also want to see what other people could do. Like there if there was 1 Jason Vorhees randomly walking 1 of your swamp areas in your world and you by chance happen to encounter him and killing him would reward some kind of gem, or pickaxe, or something. Or maybe a zombie, dinosaur, or just anything creative.

[Heavenfall]

There was an old mod that replaced hound attacks with different visitors. Can't remember more about it, though.

[kraken121]

In our mod collaboration, the hounds are replaced by other monsters as time goes on and the waves get harder as time progresses. There are other trigger attacks throughout the world as well.