Spawn next to Aboveground Mineshaft and 3 Mushroom Biomes, one of them being Fully Landlocked by Badlands!
Original author: BigBrain5Head
Link: https://reddit.com//r/minecraftseeds/comments/lf9i60/spawn_next_to_aboveground_mineshaft_and_3
Comment: Java 1.16 to 1.17 snapshot
Seed: 4014989966426115017
Cool Cave Spawner Base: 140 20