Cave Ritual Room

A large room in the back of a hidden cave that is being used as a ritual chamber to summon a temporal rift for an invading force to use. The room should be fairly large, enough for combat to take place in. Have some light sources spread out through it. And make sure there's a small rift in the middle of the room. The rift should be emitting a dark green aura. The cave should have some natural cracks in it to signify that the enemies literally just moved in and transformed this room into a ritual chamber quickly. also have some boxes strewn about the back of the room that are filled with crops that were stolen from local farms that the enemies were using as a food source.