Entity ????? Tempest
This entity is a rock the size of a basketball,
The actual looks and properties of this entity varies from who last touched it, It may be covered in ice and cold to the touch, Glowing red, sparking. It has been observed with many attributed.
What is it
Entity Tempest Is an anomalous entity That can change the weather based on the emotions of who last touched it.
Meta knowledge
What is the purpose
Storytelling mainly. You can have it blasting sandstorms on the top of a mountain or have a constant blizzard in a desert, Allowing you to place harsh conditions on the players and allow them to change it.
Maybe attach a story to it with a foundation member or civilian who stumbled upon it.