The 16 Gods of dimension Universal
Skylands biome in dim Universal
It contains treasure boxes in it.
The other 7 elements can be crafted like this, too
The elements are obtainable from the beginning, but the recipes are not shown by JEI. This example shows how to craft an element.
I bet you will try it when you get it. Currently only from loot, but will be made craftable soon.
The radar alarms you when you are being targeted by non-player creatures. They work without the need of holding in hand, just like compass.