How about a quick feat for DnD 5e..
You’ve mastered speech, word, thought, and movement in your magic. Gain the following:
- Increase your spell casting ability by 1, to a maximum of 20.
- When you cast a spell with somatic components, you may instead treat those as verbal components as you twist your tongue in ways to make the movements for your spells. A spell may never lose both the somatic and verbal components however.