Spelljammer
Table of Contents
1. Player Rules
1.1. Space
- Space is space. There is no air or gravity.
1.2. Gravity
- There is no gravity in space.
- All bodies larger than 30ft in diameter generate a gravitational pull equal to that of Earth's gravity.
- For a celestial body, any creature or smaller object on the surface of the body is pulled toward the center.
- The gravity field of a celestial body extends from its center to its outermost atmosphere at the edge of space
1.2.1. Intersecting Planes
- When two gravity planes intersect, the origins of both gravities remain in effect, regardless of size, up to the point where they physically intersect
- An object is under the influence of whichever gravity plane it is closest to.
1.2.2. Combat
- Any attack roll or saving throw in an environment without gravity using Strength or Dexterity is made with disadvantage.
- Missiles fired beyond a gravity field move unimpeded in a continuous direction until they come in contact with another object or creature.
1.3. Air
- Celestial bodies larger than 1mi in diameter generate their own breathable atmosphere.
- This atmosphere extends to the edge of space, a distance determined by the below table:
| Celestial Size Class | Celestial Diameter (Miles) | Distance Above Surface (Miles) |
|---|---|---|
| A | 1,000 | 1 |
| B | 10,000 | 10 |
| C | 100,000 | 100 |
| D | 1,000,000 | 1,000 |
- A creature who leaves the air pocket of a celestial body can survive at most 3 rounds in the void of space.
- Each round will require a successful Constitution save of DC 25 in order to take half of a base 6d12 damage.
1.4. Ships
1.4.1. Helms
- The helm is located on every pilotable ship. It requires one player to remain in it's immediate (5ft) vicinity in order for the ship to remain maneuverable.
1.4.2. Movement
- Travel speed is determined by helm and pilot -Generally, any other planet in the solar system is no more than 10d10 days journey away.
- A ship in space or the atmosphere of a celestial object can move directly up, down, or backwards without changing the direction it faces.
- The ship must come to a complete stop before it is able to ascend, descend, or move in reverse and the ship moves at half speed while moving in this way.