Source: Unearthed Arcana 85 - Wonders of the Multiverse

You’ve been exposed to the primordial magic of the Elemental Plane of Earth, granting you the following benefits:

Elemental Magic. You learn the Druidcraft cantrip, using Intelligence, Wisdom, or Charisma as the spellcasting ability (choose when you select this feat).

Earthen Shield. You can use a bonus action to conjure a bulwark of earth that provides half cover to you or a creature of your choice within 30 feet of yourself. The bulwark remains until the start of your next turn. You can create this bulwark a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.