Hydaelyn

A fortress of stone erupts from a square area of ground, creating a fortified structure with turrets, walls, and a keep. The fortress includes a staff of invisible servants and can be customized in design, providing shelter and sustenance for its inhabitants. It can be damaged or destroyed by physical force. It has a staff of 100 invisible servants. This spell lasts for 7 days. If casted every 7 days in the same exact spot for 52 weeks, the fortress becomes permanant. If the spell is casted elsewhere while another is standing, or if the duration ends, the fortress will slowly melt into the ground and disappear, gently letting down any creatures that were inside.