Song of Rising Barriers(Jayna Warlock)
You can create a barrier of elemental energy, based on your elemental aspect. You may only have one barrier active at a time. Creating a new barrier dismisses an existing one. The elements (and their associated spells) are: air (wind wall), earth (wall of stone), fire (wall of fire), metal (wall of iron), void (wall of force), water (wall of ice), and wood (wall of thorns).