New Animal Idea

[QLMX]

I thought about a concept like the ghosts (Boos) from the Super Mario series.

For the ones who don't know what they do:
If you look at them, they close their eyes and won't move. If you turn your back to them they slowly start creeping towards you.

Maybe we can add an Ish-version of them in Ark? 
-You look in their direction, they'll hide or disguise as an everyday object in ark.

-you're not looking and they'll start engaging you (you'll notice them getting closer by paying attention to the sounds they make)

-you can only kill them, when they're visible

-you need a special device (lamp?, ...) to see them

-when exposed they start attacking you

-if they successfully engaged you without being noticed / exposed, they can kill you with one hit.

-a one-shot ability could sound a bit broken but we can adjust the health of the animal then. Low hp, high damage.

[SapphireSam7]

This is a hard one. 

I am not sure if a "ghost" is what Ark is going for. Dino's, Fantasy Creatures, Mythical Creatures, and perhaps even modern creatures to a degree - sure. Not sold on the ghost concept though. 

Perhaps if the creature wasn't a ghost though... that may work. 

Such as a new form of bat that hides in the trees and only comes appear at night. They could hide in trees and swoop to grab you and pull you to the skies to drop you. However if you are lit up, by either a glowpet, torch, or perhaps a new form of light to travel with, they will limit their attack to behind you so you have a chance to turn and scare them away.

It takes a bit from what what you are offering, but changes it into a creature that would a nightmare to deal with at night. 

It a bat form was used it could be the size of an Argy or Owl and if tamed, would act as the Megalosaurus and sleep at day with boosts at night light. 

[Dinobros2000]

Hmmmm.... no and not elaborating