Spell of Choice
General Feat (Prerequisite: Level 4+, Spellcasting, Spellcasting ability of 15+)
You gain the following benefits.
Ability Score Increase. Increase your Intelligence, Wisdom, or Charisma by 1, to a maximum of 20.
Spell Specialization. Select one of your spells of 2nd level or below. When casting this spell, your DC increases by 1, your Spell Attack bonus increases by 1, you gain Advantage to maintain concentration or make saving throws against Counterspell regarding this spell. Attempts to Dispel Magic this spell are made with Disadvantage.
Always Prepared. The spell selected for Spell Specialization is always prepared and you may cast it once without expending a spell slot. You regain the ability to do so once you complete a Long Rest.
Retraining. You may replace the spell selected for Spell Specialization whenever you gain a new level.