Dimensional Doorway

You create a dimensional doorway 7 feet high and 4 feet wide, on any surface. Upon opening the door, it creates a space up to 5 feet deep through the surface material. If there is an open space beyond the surface, the doorway acts as a means of egress. Only you can pass through the doorway. To all other creatures, this appears to be a translucent illusion over the otherwise solid surface. At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, one additional creature you touch can use the door for each slot level above 3rd.