Pact of the Mask 5e Warlock (Pact of the Tome re-skin)
by Marc SaindonPact of the Tome: Your patron gives you a grimoire called a Book of Shadows. When you gain this feature, choose three cantrips from any class's spell list (the three needn't be from the same list). While the book is on your person, you can cast those cantrips at will. They don't count against your number of cantrips known. If they don't appear on the warlock spell list, they are nonetheless warlock spells for you.
If you lose your Book of Shadows, you can perform a 1-hour ceremony to receive a replacement from your patron. This ceremony can be performed during a short or long rest, and it destroys the previous book. The book turns to ash when you die.
Warlock
The idea is basically the same mechanics, except you have a mask of your Patron, and you have to wear it to access those extra Cantrips. A fiendish Patron's mask would look demonic, an undead Patron's mask would have a skull motif, etc.
Alternately, a drum could be designed as a summoning instrument for the Patron's power in the same manner (this would actually also work well with the Atruaghin Clans), and with Warlock being a Charisma class, this might fit well with the Griot (Bard) as a companion.
Drums in communication
(Image from: https://en.wikipedia.org/wiki/Traditional_African_masks#/media/File:Masques_BaKongo.JPG)
