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A Great Old One patron was one possible sponsor for a warlock. If a bargain was made between a warlock and a being from the Far Realm, an elder evil, or some other ancient and mysterious being, the warlock's patron gave them access to certain powers, including a suite of spells that expanded the choices to fill their spell slots.[1]

Great Old One Patrons[]

List of Great Old One patrons

Great Old One Patron Expanded Spells[]

1st level 
dissonant whispers, Tasha's hideous laughter
2nd level 
detect thoughts, phantasmal force
3rd level 
clairvoyance, sending
4th level 
dominate beast, Evard's black tentacles
5th level 
dominate person, telekinesis