Temple Grounds
From Starsonata Wiki
The Temple Grounds is the beginning of the adum Trials. It is guarded by some Devine Seraph that are equipped with Ambrosia Lasers causing forced thrust. The top right gate is the adum Trials which holds the Sentinel Seraph who is invincible and will show you the way of truth. Those who pass the trials will be blessed with an unknown reward. The Top Left gate leads to the High Prophet, a devastating boss who is not to be messed with.
It is here where you can get Imperial Tweaking up to 3 with the cost of 2 Imp Seal per IT wanted + Credits.
Rumors talk about a super secret base which holds amazing items when found.