DnD 5e – New Great Old One Warlock Handbook

The Great Old One is a fantastic concept for a warlock, but doesn’t come up much in optimization discussions because it’s not conventionally powerful in a way that you can measure with DPR, locks picked, obstacles overcome, or anything else of the sort. But it can still be very powerful in the hands of a clever, engaged player who is capable of the sort of abstract, sideways thinking that befits a great old one.

Great Old One Warlock Handbook