Every species must be more than a skin, stat change, or list of powers. It needs a clear identity, survival logic, limits, and a place in the world.

1. Every species must be different.
A species must feel new. It cannot be a plain human, a human reskin, or a direct copy of a classic fantasy race.

2. Every species must have an end method.
Players need a public way to permanently kill or permanently capture the species. See Permanent Death / Capture.

3. Every species needs basic gameplay systems.
Every species needs abilities, food logic, recipe logic, and custom model / skin rules.