Memorized Magic

Your orginies mind and Talent in magic gives you following benefits:

• You devote time to memorize some spells you gain, 
  Memorized spells: Choose a number of spell equal to your proficiency modifier, you must know those spells, these spells are always prepared for you, 
  you can't change the chosen spells.
• Twice per short rest can you cast the Memorized spells instead as an action, as bonus action.