Defenestrate

You create a window in a wall up to 45 feet away. The wall must be no thicker than 2 feet. The window created can be of any style the caster chooses, and materializes filling the wall from floor to ceiling and is 10 feet in width. Each creature of large size or smaller in a line between you and the window must succeed on a dexterity saving throw or be thrown backwards by an invisible force through the window, in addition to suffering 4d6 Force damage plus your spellcasting ability modifier. If a creature succeeds on a dexterity saving throw they take half damage and are not knocked backwards.

For every spell slot above 3rd level you cast Defenestrate at, increase the force damage by 1d6 and the maximum allowed thickness of the wall by 1 foot. If cast at 6th level or higher, the window will be big enough for a huge creature to pass through and is 15 feet in width. After one hour the window will disappear and the wall will return to normal.