Earthworks
With a ripple of earth, you raise small barriers from the ground. The ground in the area becomes difficult terrain. The spell's area is a 5-foot burst if you spent 1 action to cast it, a 10-foot burst if you spent 2 actions, or a 15-foot burst if you spent 3 actions. A creature can Interact to clear the barriers from one 5-foot square adjacent to it.
Heightened (4th) You pull the barriers to float in the air, causing the spell to function as difficult terrain for flying creatures
Traits
An action with this trait requires a degree of mental concentration and discipline.
Effects with the earth trait either manipulate or conjure earth. Those that manipulate earth have no effect in an area without earth. Creatures with this trait consist primarily of earth or have a connection to magical earth.
Focus spells are a special type of spell attained directly from a branch of study, from a deity, or from another specific source. You can learn focus spells only through special class features or feats, rather than choosing them from a spell list. Furthermore, you cast focus spells using a special pool of Focus Points—you can't prepare a focus spell in a spell slot or use your spell slots to cast focus spells; similarly, you can't spend your Focus Points to cast spells that aren't focus spells.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.
This indicates abilities from the wizard class.