Earth domain

You make a big cylinder-shaped hollow rock that is strong on the inside and outside and is unbreakable unless the user decides that they are safe now and want to come out or if a player or monster rolls a D20 on a spell that is directed towards this structure in order for this spell to activate you must roll a [6 or higher on a D20 dice for this spell to work]. An when cast this spell makes a hollow-shaped rock cylinder come up from the ground and cover you so you are safe this cylinder is 20 by 12 feet wide and 7 feet tall if there's no space for it this object will push things away until it has reached 7 feet. if you happen to be in a cave though once it hits the ruff or sides of a tunnel it will stop because its conditions were met because the cave and cyl;ander are touching. And once the player or monster breaks this shelter the whole thing will crumble apart and melt back into the ground and the tunnel or room will look like nothing ever happened.