Polymorph Master (5e Feat)

Prerequisites: The ability to cast the polymorph spell
You have mastered the ability to change your shape. You gain the following benefits:

When you cast the polymorph spell, you may have the spell not require concentration. Once you use this feature, you can not use it again until you finish a long rest.
When you cast the polymorph spell on yourself using a spell-slot of 5th level or higher, you may choose to become a beast that's challenge rating is one higher than your level.
When you are transformed by the polymorph spell, you can retain your Intelligence and Wisdom scores, as well as all of your proficiencies.