Cave Entrance

An montain hill side with a big cave entrance. There's vegetation around the cave, but as you get closer and closer to the cave entrance, all the flora begins to die out, leaving only a purple rock like obsidian. Everything else feels magical but eerie, as if something inside the cave is not natural and alive. It drawns upon the magic veil and have wind currents rushing into the cave, while the outside is full of life, with a thick and beatiful grass, some flowers and one huge sunflower