Interesting stuff.
Good point; there's no way to make a pact with a being who's unaware of your existence. The technical term for this is "crappy writing" and it shouldn't have gotten past the PHB editors. The whole warlock section reads rather badly, IMHO.
From reading the PHB, the Great Old One may not want anything from you either; it "might be unaware of your existence or entirely indifferent to you." I don't see how you could actually make a pact with another party that doesn't even know you exist, but those warlocks get powers all the same
In the case of Great Old One (and the base description of this new option) the word Pact is serving more to indicate at minimum only a ritual binding, not necessarily a direct contract. The designers were trying to cover multiple concepts with the class, not just trying to make arcane pseudo-clerics (just as monk covers more then monastic martial artist and barbarian more then Conan). Fantasy is filled with examples of cultists and madmen siphoning the power of dangerous entities, and in many cases it turns out the entity isn't even aware of it (beyond a "hey, is that the dinner bell?" level) even if the warlock involved has created elaborate delusions to the contrary. When elsewhere in the game the words Chain, Stillness, Tides, Slippery, Supreme, Breaker, etc are used to label features they aren't intended to be literal, they are meant to be evocative, so overfocusing on the strict definition of the word "Pact" I feel limits the concepts supported by the class. That some Warlocks can "bolster their own power" by "drawing on the ancient knowledge of beings" rather then be beholden to them is a benefit, not a flaw, of the text.
From reading the PHB, the Great Old One may not want anything from you either; it "might be unaware of your existence or entirely indifferent to you." I don't see how you could actually make a pact with another party that doesn't even know you exist, but those warlocks get powers all the same
One of the most interesting things about the Warlock class is, as a player, coming up with a backstory that contains the details behind your pact. Who its with, what event led to the deal, what are the apparent downsides (that you yet know of), what happens if you try and break the pact, can you get out of it and if so are you still a warlock or able to progress further?
I'm really struggling to come up with anything for a pact with energy.
Some editions back I had a cleric who worshipped the concept of cleanliness: He wore an old cleaning bucket for a helmet, had a brush as his holy symbol, and wielded reinforced brooms as weapons. He was crazy enough I'm pretty sure no deity would have ever wanted to claim him, but he was convinced enough in his righteous cause that divine power was never an issue...In the past I used to tell Clerics players that there was even a chance their deity didn't really exist, and that the source of their spellcasting powers could be wholly in their faith.