The void. It had been his abode for the longest time. Had it been a century? A millennium? The Sentinel did not know. What it did know was that it awoke once with little memory of his prior life. All it remembered was that it was ever so curious of everything. Still, it couldn't continue its existence for too long for it needed to rest, and solidify its existence. Thus, its mind remained in the void, left to simply be. However, something drew the Sentinel back. He felt a foreign life force enter the premises of his domain. No... it was numerous beings that he felt. Thus, he was pulled back into existence due to these... visitors. It was the same enclosure that he first found himself. It had obviously been built before... but by whom? The Sentinel did not know. 

Regardless, there were more pressing things that needed his attention. The intruders were still far. Miles away at the mouth of the cave, so The Sentinel did not do anything. Rather it waited. The people took a few hours, but they were finally within a reasonable distance from the temple that The Sentinel was enclosed in, about 300 meters. It was then that the Sentinel took action. It began to slightly probe the minds of these beings, trying to learn what he could without giving these beings discomfort, and as the Sentinel did so it spoke to each of them in the language that it inherently knew through its telepathy. "Why are you here, and what is it that you seek?"