It seems kinda hard to have a hidden location in the Astral, where if someone knows of its existence, you think hard and get there...
Maybe that the point? By this time/level its not about the journey, but the destination?
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So, I think the Astral Sea is a regression in comparison to the Phlogistan of 2E ... but I'm running 5e Spelljammer as a DM, so I made some rules for the Astral Sea:
Travel through the Astral Sea and Wildspace
Travel through the Astral Sea occurs through thought alone. One need only think of the place one wishes to fly to, and already one knows the direction in which to travel—or do they?
These optional rules make travel through the Astral Sea and Wildspace a bit more interesting.
Navigation in the Astral Sea
Navigating the Astral Sea requires focused thought in order to reach a specific location. On average, a journey through the Astral Sea from one location to another takes
3 days.
Places such as
Wildspace systems, astral domains, or settlements on dead gods are easier or harder to reach within the Astral Sea. As the DM, you decide how easy or difficult a region is to reach and assign an appropriate
Difficulty Class (DC).
Difficulty Class Examples
| DC | Examples |
|---|
| 5 | A god who wants you to fly to them |
| 10 | Realmspace and other well-known major systems |
| 15 | Standard difficulty |
| 20 | Remote, rarely visited worlds and systems |
| 25 | The domain of a god of secrecy who does not wish to be found; a hidden system of gods or other powerful beings |
Every creature attempting to navigate the Astral Sea must make an
Intelligence check against this DC.
Based on the table below, you can see what happens if you exceed or fail the DC:
Result of the Navigation Check
| DC Missed/Exceeded By | What Happens |
|---|
| –10 | You reach a system that bears some resemblance to the one you actually wanted to visit, within 10 days, and the first random encounter you have is hostile. |
| –5 | You reach a neighboring system in 7 days. |
| DC failed | You reach the destination in 5 days. |
| DC succeeded | You reach the destination in exactly 3 days. |
| +5 | You reach the destination in 2 days. |
| +10 | You reach the destination in 1 day. |
For each day a group travels in the Astral Sea, the DM rolls
1d20.
On a roll of
1–9, nothing happens.
On a roll of
10+, roll on the
Astral Sea Encounters table on page 6 of
Boo’s Astral Menagerie to generate a random encounter.