As you know the world has been untouched by humans for over a billion years now. Creatures and Plant life have evolved some looking nothing like they formerly did when humans were still around.
With this knowledge I'm going to allow each person who plans to actively posting in the RP to personally create 3 POSSIBLE creatures and/or plants.
Both will be required to have a picture. (It doesn't have to be perfect but it also shouldn't be horrible. If you can't draw find somebody like trig to help you)
If it is an animal include the specs:
Is it carnivore, herbivore, or omnivore?
How big does it get?
How aggressive is it?
What defenses does it have and is it edible?
The basics such as that.
If it is a plant:
How big does it grow?
Is it edible?
What medical values does it have (if any)?
Etc..
The RP is going to start some time this week but animals and plant life will be accepted even after the plant life starts (As there is plenty of room to add new critters and plants into a world that is nowhere near explored yet.
