and yuan-ti. In May 2005, Wizards of the Coast updated the neogi to the 3.5 edition rules in the supplement Lords of Madness (2005). The book included a chapter with a sample map of a crashed Spelljamming vessel, cultural habits of the neogi, and the monster's stat blocks. Dungeons & Dragons (4th edition) A Spelljammer homage appears in the 4th edition Manual of the Planes; the sourcebook highlights Spelljammer ships as one method of traveling between planes and provides information for in-game use of Spelljammer vessels. Dungeons & Dragons (5th edition) Spelljammer content also appears in the 5th Edition adventure module Waterdeep: Dungeon of the Mad Mage (2018). In the adventure, a spelljamming ship and its illithid captain appear stranded in level 19 of the titular dungeon. Then in October 2021, Wizards released the PDF Travelers of the Multiverse which is part of the "Unearthed Arcana" public playtest series. Of the six player races it included, four races (autognome, giff, hadozee, and plasmoid) are closely associated with the Spelljammer setting. Both Polygon and Bleeding Cool highlighted that this playtest could indicate a future Spelljammer reboot. In April 2022, Wizards of the Coast announced a new boxed set titled Spelljammer: Adventures in Space which was released on August 16, 2022; this release updates the Spelljammer setting for the 5th Edition. The box set includes a Dungeon Master's screen, a double-sided poster map and three 64-page hardcover books: Astral Adventurer’s Guide (a Dungeon Master guide), Boo's Astral Menagerie (a bestiary), and Light of Xaryxis (an adventure module). A special edition, with cover art by Hydro74, was also released. A prequel adventure module, titled Spelljammer Academy, was released for free on the Wizards of the Coast website and on D&D Beyond in July 2022. Fictional setting Spelljamming helms Spelljamming helms are the central setting concept which allow interplanetary and interstellar space travel for vessels which would otherwise not be spaceworthy, in the form of a helm. Any spellcaster may sit on a spelljammer helm to move the ship. The mysterious race known as the Arcane is the sole manufacturer and distributor of spelljamming helms. Within the Dungeons & Dragons universe, they are a method of converting magical energy into motive power. Gravity and air All bodies of a sufficiently large size have gravity. This gravity usually (but not always) exerts a force equal to the standard gravitational attraction on the surface of an