Warlock Versatility
Warlocks are able to pick their key ability for spellcasting from Intelligence, Wisdom, and Charisma. Where class abilities state to add or use your Charisma modifier, use your chosen key ability, instead. Similarly, a Warlock’s proficient saving throws are Wisdom and either Intelligence or Charisma.
If the warlock’s patron is a quasi-deity, exarch, or other deity-linked extraplanar being, they may choose the divine spell list instead of the arcane spell list, or if their patron is an archfey, primordial power, or other nature- or primordial-linked extraplanar being, they may choose the primal spell list instead of the arcane spell list. Regardless of their base spell list, the warlock still has access to the warlock spell list, however the DM may rule some spells off-limits to a warlock based on their pact source, such as a fiendish patron who forbids spells from the divination school or a celestial patron who forbids spells from the school of necromancy.
Added to House Rules in 2023.