Some Ideas for some more "creepy" affects of having your temporal stability or being in a temporal unstable area.

[Celluin]

Imagine if you will, your stability has gone down but not yet where mobs spawn but you start hearing footsteps or you hear your doors open at your house but nothing opened. Horror stuff that would subtly mess with the player and progressively get worse and more often based of temporal  affects, before any mobs start spawing. Just some ideas that could make it feel like the rust world and the normal world is blending together before you end up in the rust world. Any ideas anyone has that could make this work better? 

[VictorShadow]

Herobrine is that you?

I wouldn't mind there being some more obvious way to tell if you're in temporal unstable surface area as I've several times spotted cool places to build, only to get to them and have the temporal gear slowly turn counter clockwise.

could have unique plants or flowers that only grow on temporal unstable land, something small that wouldn't change the alive/realistic view of the world too much. (Not like the pale "garden" forest biome in the other game)