You clasp your hands and gain control of the area within 200ft. This functions similarly to a demiplane, with this area completely within your control.
This does not require concentration, instead, it is maintained by the continual use of your mana every round. This must be done manually and costs 2 mana a turn to maintain.
You clasp your hands; the air shimmers as space warps around you. Within 200 feet, landscapes shift at your whim—trees uproot, ground elevates or sinks, light bends—everything molds to your will in this self-made domain.