Witch/20th

Masterful Learning

At 20th level, you become a library of knowledge and a pinnacle of magical research. You can learn any one spell of 11-points (8th level) or lower from any class's spell list and cast it as if it was a researcher spell.

You also gain the following benefits:

• When casting a spell you have learned with your Varied Learning feature, you do not need to expend extra magic points (or a higher level spell slot) to do so.
• You have advantage on all Intelligence checks and saving throws.
• You can always accurately remember any text or scripts you have read since you acquired this feature, even if it was from a language you didn't understand.