I'm requesting a mod to have an addition to the cave on your property, as well as craftable planter boxes for the purposes of growing mushrooms, coconut trees, and cactus plants. This is how I think it could work: 1.) 'Upgrade' your cave Once you get a Megabomb, you can place it against the back wall of your cave. This reveals a crystal wall, that when broken with an Iridium Pick, reveals a larger cave covered in dull blue crystal (figure roughly the same size as the green house). There is a small pond in the center of the room. 2.) Choose your environment On the back wall of this new cave is a small hole with a large circle above it. When you inspect it, you learn 2 new recipes, Sunstone Seed Crystal and Nightstone Seed Crystal. The Sunstone Seed Crystal requires 200 Solar Essence, a Prismatic Shard, and a Diamond. The Nightstone Seed Crystal is the same, but substitute Void Essence for Solar Essence. Once crafted, place your Seed Crystal in the Crystallarium, and wait 7 days for the Pure Stone of your choice to be created. Place your Pure Sunstone in the Cave receptacle (the small hole), and the circle above it becomes bright like the sun, turning the blue crystal walls sky blue, revealing the ground to be pure desert sands ideal for coconut and cactus, and the pond is stocked with fish normally native to the Calico Desert. The Pure Nightstone turns the circle into a crescent moon, the walls dim to a dark purple, glowing crystals hidden behind the walls shining through like starlight. The cave floor is perfect for Cave Carrots, Mushrooms, and Fiddlehead Fern. The pond is stocked with various cave fish, even Lava Eels, which are somewhat easier to catch here. In both cases, Legendary fish can be found here if the original is thrown in, but only one at a time. 3.) Planters In order to plant anything in the cave, you need a Planterbox. Placing Coconuts, Cactus, Mushrooms, Cave Carrots, or Ferns in them will produce every day or three (depends on luck). In the Case of Coconut, placing coconut in a planterbox will eventually result in a tree, which will destroy the planterbox in the process. Alternatively, you can plant Coconuts in their planters on the Beach. Cacti will not grow on the Beach.
Maybe The Nightstone Cave could have it's Moon go through the lunar phases over the course of the month?
