Hello Fellow DMs,
I've been tinkering on a campaign for my players ut there is something that I've always wanted to do / see work.
A entity (? -> could be a forgotten god, high mage, but I'm not sure about its origin ) called "The Omniscientem" ( from the name alone you should be able to deduce some of its powers ).
So this entity is a passive observer and takes action only if the "natural" ( subjective ) balance of things are disrupted by making them "never happen" or "it's simply been this since always".
This entity is not a villain or a hero's aider, just going on about his day, and the PCs can encounter him and if they bear hostility or "ask too much" it either helps or it taunts them by temporarely removing them access to part of their class actions or abilities, or even worse saying things like:
"how can you ask me to show you the real reason behind the actions of men if you were never able to see them for yourself" and -removes- the eyes from the PC that asked the question.
My question is, how do I communicate that this is someone that they need to be weary or leave alone and only resort to his "help" only in dire situations later on in the campaign, near the final boss encounter.
P.S. I've made the campaign first with the thought of adding him coming later on, so they don't really need his help to complete it.
EDIT 1:
I see that some of you show the same concern that I had at first when thinking about this, maybe it's better to gain experience in other kinds of "show don't tell" and see how my player reacts, then change some of this character to better fit my narrative without taking away the fun from the players.