Phantasm is a brand new server created in 1.16. The server features game modes such as: Parkour, Prison, Creative, Survival, Bedwars, Skywars, Build Battles, and Hunger Games. Most of these game modes will be disabled or are being worked on, you can check the status inside of the game select in the hub. Rumors are going around that the world is a simulation, it is pretty weird. I would keep an eye on the hub if I were you. Join the Discord for progress updates and chat with the community.