You follow a monastic tradition that teaches you to harness the elements. When you focus your ki, you can align yourself with the forces of creation and bend the four elements to your will, using them as an extension of your body. Some members of this tradition dedicate themselves to a single element, but others weave the elements together.

Homebrew by Lyydia, @DMLyydia on Twitter

Elemental Attunement

Starting when you choose this archetype at 3rd level, you are able to channel the elements in your movements. Choose one elemental attunement and gain its benefits. You can enter a stance a number of times equal to your Wisdom modifier, and you regain all expended uses when you finish a long rest.

You can choose an additional attunement when you reach 6th, 11th, and 17th levels.