astraldnd-5eplanes
I am making a campaign where a tarrasque is on a rampage, and the players have to ask a deity to help them defeat it. I was thinking of making them go to the different planes where they could find a deity, like the Astral Sea, but I have no idea how it looks.
Does it look like a big ocean where you can find some islands with gods, or is the sea term just to represent an imagery like the Milky Way looks like milk?
The Plane Above is the 4E sourcebook for the Astral Sea, and includes a paragon-tier "mini adventure" set in the Astral Sea, as well as other adventure hooks. The book is about 150 pages, and the adventure is only a half dozen of those, give or take. The Manual of the Planes also spends about 30 pp on the Astral Sea, but there are no adventures. I believe there may be some hooks.
There are sourcebooks from previous editions that cover the astral plane, most notably 2E's Planescape's A Guide to the Astral Plane (which does not contain any premade adventures). The cosmology of 4E differs drastically from that of previous editions, however, and the Astral Sea of 4E is quite different from the Astral Plane of the 1-3E "Great Wheel" cosmology.
To the best of my knowledge and research, there are no adventure modules published by Wizards or TSR that were set in the astral anything.
Some common “spider” tropes to consider, based on various attributes of spiders; many of these can be played up and portrayed in a positive light.
Probably the most noted characteristic of spiders is their (mostly) unique ability to spin webs. Spider silk is tremendously strong for its weight (to the point that modern attempts have been made to domesticate spiders for the purpose of harvesting the silk), and the webs that spiders produce are often beautiful.
The most direct association with web-weaving is to that of craftsmanship. A spider god as artisan god is no great stretch, and the beauty, strength, and utility of spider webs makes for a solid demonstration of the association.
In real-world folklore, the story of Arachne is probably the most famous. In Ovid’s version of the tale, following typical Greek tropes, Arachne was punished for her hubris, but even the enraged and humiliated Athena left her able to continue her beautiful weaving. In another, Athena does win the contest, and by the rules Arachne could never again touch a loom or spindle again: there, Athena transforms her into a spider so she could continue weaving without a loom or spindle; a consolation prize.
Because weaving is associated with fate (specifically, the Fates of Greek mythology), and spiders with weaving, it is no great stretch to associate spiders with fate. I am not aware of any real-life folklore that makes such an association, but the opportunity is certainly ripe and should resonate with players aware of both “the tapestry of fate” and spiders’ weaving.
As noted below, spiders (and their venom) are associated with assassination, which is itself often associated with fate (cf. religious assassins acting as the hands of fate).
Weaving doesn’t have to be literal: we often speak of weaving tales and stories. The careful, crafty nature of a spider is also a good metaphor for the way a storyteller spins a story (and the choice of verb here is very much intentional).
From real-world folklore, Anansi is an African god of stories. He’s smart and clever, and is one of the most important gods in that tradition. Particularly in the Caribbean, he is associated with slave resistance and survival. Definitely a possibility for a CG god.
I’m not overly familiar with the real-world folklore surrounding Anansi (having only just read the Wikipedia page), but for an interesting portrayal of the character, Neil Gaiman’s American Gods and Anansi Boys deals with him (though he is not the central character of either). Good reads.
Like stories, spells are often described as woven. Spiders are also frequently associated with secrets and arcane knowledge, which obviously fit hand-in-hand with spellcasting.
For instance, spellweavers in D&D itself are eight-limbed (two legs, six arms) humanoids with considerable mastery of spellcraft. The association with spiders should be apparent.
All spider species, save for one family that lost its venom glands over the course of evolution (262 species out of appoximately 40,000), produce venom of some kind, and almost all actively use it in predation or self-defense. Most spiders are strictly predatory, though new research has revealed that plant matter is involved in the diets of a fair few species and access to plant-based food sources improves their longevity.
Spider venom can have medicinal properties, and spiders have been associated with potion brewing and the like. Furthermore, because of spiders’ associations with knowledge and secrets, a spider might very well be the place to go for the secret remedy to an ailment.
For a real-world context, I’m actually going to draw a parallel between spiders, and another famously-venomous animal: the snake. Snakes have long, in our world, been associated with medicine; one of the most well-known symbols of medicine is the Rod of Asclepius, a staff with a snake wrapped around it. Perhaps for this culture, in this world, that association fell to the spider rather than the snake: after all, only some snakes have venom, but (almost) every spider does.
Venom is, in many ways, an equalizer: a way for a smaller, weaker target to defend itself from a larger, stronger foe. That is how many spiders use their venom, and it has historically been an aspect of poison for humans as well. Some historians have even posited that the negative association of poison, above and beyond other lethal weapons like swords, has as much to do with it being a threat against the establishment (who can protect themselves against more visible threats).
Thus, in a smaller, weaker race, spiders may be seen as mentors and guides, cunning tricksters who know how to best stronger foes. Anansi, mentioned above regarding storytelling, is this; in the Caribbean he is celebrated as a symbol of slave resistance. Mephala, mentioned below in the section on assassins, is also, the daedra who taught the dunmer how to protect themselves and eliminate threats.
An extremely common trope, though usually one of the stand-out “evil spider” tropes, poison’s use in assassination and the well-known venom of several spider species makes for a very frequent pairing.
That said, positive portrayals of assassins exist in fiction. The concept of carefully eliminating one source of evil, killing one to save a thousand, etc., shows up from time to time. Definitely a controversial sort of good, and probably not enough to justify a Good label for a spider goddess in the eyes of players, it’s still worth considering, perhaps as a darker facet of a generally-wholesome goddess; even Good needs to go to war sometimes in D&D.
Furthermore, many somewhat-positive portrayals of assassins show them as being agents of fate. Again, due to the whole tapestry of fate thing, spiders fit into this motif exceedingly well.
For an example, I’m going to point to the Morag Tong of The Elder Scrolls III: Morrowind, where the traditional assassins’ guild is a cult to Mephala, a daedric “goddess” who is revered in both the traditional daedric cults of the dunmer and in the Tribunal religion that dominates the province in the time of the game. Daedra certainly aren’t good, but the dunmer generally viewed her positively – Mephala taught the dunmer how to defend themselves and destroy their enemies. During the time of the game, the Morag Tong was effectively the way in which battles between the Great Houses were fought, rather than open conflict; this was seen as saving many lives and much destruction. Compared to the Dark Brotherhood and Cammona Tong, the Morag Tong definitely has a more positive portrayal in the game.
Spiders are one of the most immediate “creatures of darkness” in the human mind, along with bats. While certainly something played up quite a lot in negative portrayals and associations of spiders, it can have positive aspects too.
Spiders are often associated with secrets and information-gathering. One does not need to look far for a spymaster called “The Spider” or similar. Varys in A Song of Ice and Fire comes to mind first for me, but he’s not alone.
Secrets are often dark, and those who trade in them often depicted as sleazy; Varys is certainly such an example. And yet no one would discount the importance of secrets, and to many cultures, particularly fictional ones, secrecy may be critical to survival. Certainly the Elder Scrolls dunmer, mentioned above, appreciated Mephala’s ability to keep them hidden.
Secrets also tie into both spellcasting and stories; Anansi, the spider god of stories above, is also god of secrets.
Best Answer
If the astral plane is a "sea," you are a fish
There is a description of the astral plane in the Dungeon Masters Guide (p. 46-47, bold added). There, it states:
When you hear that the astral plane is like a "sea," it's natural to picture it from the surface of the water, because that's the main way that humans interact with the sea. But the astral plane is more like a sea with no surface or floor. Although you might find solid material there, the concept of an "island" is somewhat misleading. Also, note one other important detail (DMG, p. 47):
So you could find any number of living things in the astral plane without finding any "land" for them to live on. Unlike the material plane, traditional life isn't necessarily tied to any particular ecosystem. In other words, the plane could essentially contain anything or nothing. The only limits are what you can think of: because thoughts are precisely the source and nature of the astral plane.