So a dungeon around this concept is one thing - a fascinating thing! - that can be uncontrollable, chaotic, and lovely! The inhabitants of your dungeon already know that this happens, so they're always expecting it, meaning they won't be surprised if gravity suddenly reverses - and their attacks or abilities might even develop to revolve around this! While your PCs are suddenly turned upside-down, the Reverse Gravity Cave Spider Or Whatever might have learned how to use its reaction to suddenly attack creatures whose gravity is suddenly reversed!
However! A village, town, city, region, world, etc? Different story! Such a place would have, over time, developed ways to deal with this phenomena by developing technologies to counteract against it, mitigate it, or help make it advantageous to society, such as handheld items that mitigate its effects or else building a society literally around that. The exception if it's a VERY new phenomena.
The other aspect if it's been caused by someone or something purposefully. That means someone or something is using it on purpose to their advantage - to guard, hide, or otherwise keep away from others a particular object, place, etc? Traps could be built around it, such as "Every 10 ft you travel, DM rolls a d20 and on a 15+ gravity reverses" with weighted tiles on the veiling PCs might accidentally bump into to activate all sorts of nasty traps, boulders to fall away which were previously blocking a horde of tiny creatures (bats, spiders, whatever) from swarming, which now do, etc.
Also, don't be afraid to consider what reversed gravity might do to spells and attacks! PCs who aren't used to it but find themselves upside-down in a battle might roll attacks against a sudden swarm all at disadvantage. They might aim a spell, only to have it go in the opposite direction! Perhaps they try to feed someone a potion, but a potion isn't affected and it goes pouring uselessly the other way.
Lastly, consider items that might be left suspended in mid-air by this spell. Those could pose some nasty hazards for adventurers, but also make for some amazing puzzle opportunities. The PCs could walk into a room that feels otherwise normal except for the statue suspended, floating, in mid-air. They have to move around the room until they trip the Reverse Gravity effect and cause it to drop on a pressure-plate, or stepping on a plate might reverse gravity in that room and cause all sorts of weighted items to go up in shenanigans!
Having gravity effected can, after all, fall into 4 distinct categories: suddenly MORE, suddenly LESS, suddenly NONE, and suddenly REVERSED.
Well i had thought that it would be a thing that just happened daily and every now and then the gravity changes ,but utilising it would prove interesting.
Just to play devil’s advocate here. What will this add to the game, will it be fun or just annoying and does it matter to the story? Sometimes things like this sound cool (and it does sound cool) but in actual play it’s just bothersome. It could be the kind of thing that works better in small doses, as in a single dungeon as gamsii suggested, rather than a global phenomenon. Maybe try doing it in a dungeon and see if you think it would work across an entire campaign.
I would recommend at the least a test dungeon to see how your players react to the gravity switching and to see if you like running it. If it's a hit, maybe the bad guy runs off with the gravity gem or whatever that makes gravity be normal so now the whole world is affected.
so my campaign/dungeon has a mechanic where the gravity fails every now and then but i need help with it
So a dungeon around this concept is one thing - a fascinating thing! - that can be uncontrollable, chaotic, and lovely! The inhabitants of your dungeon already know that this happens, so they're always expecting it, meaning they won't be surprised if gravity suddenly reverses - and their attacks or abilities might even develop to revolve around this! While your PCs are suddenly turned upside-down, the Reverse Gravity Cave Spider Or Whatever might have learned how to use its reaction to suddenly attack creatures whose gravity is suddenly reversed!
However! A village, town, city, region, world, etc? Different story! Such a place would have, over time, developed ways to deal with this phenomena by developing technologies to counteract against it, mitigate it, or help make it advantageous to society, such as handheld items that mitigate its effects or else building a society literally around that. The exception if it's a VERY new phenomena.
The other aspect if it's been caused by someone or something purposefully. That means someone or something is using it on purpose to their advantage - to guard, hide, or otherwise keep away from others a particular object, place, etc? Traps could be built around it, such as "Every 10 ft you travel, DM rolls a d20 and on a 15+ gravity reverses" with weighted tiles on the veiling PCs might accidentally bump into to activate all sorts of nasty traps, boulders to fall away which were previously blocking a horde of tiny creatures (bats, spiders, whatever) from swarming, which now do, etc.
Also, don't be afraid to consider what reversed gravity might do to spells and attacks! PCs who aren't used to it but find themselves upside-down in a battle might roll attacks against a sudden swarm all at disadvantage. They might aim a spell, only to have it go in the opposite direction! Perhaps they try to feed someone a potion, but a potion isn't affected and it goes pouring uselessly the other way.
Lastly, consider items that might be left suspended in mid-air by this spell. Those could pose some nasty hazards for adventurers, but also make for some amazing puzzle opportunities. The PCs could walk into a room that feels otherwise normal except for the statue suspended, floating, in mid-air. They have to move around the room until they trip the Reverse Gravity effect and cause it to drop on a pressure-plate, or stepping on a plate might reverse gravity in that room and cause all sorts of weighted items to go up in shenanigans!
Having gravity effected can, after all, fall into 4 distinct categories: suddenly MORE, suddenly LESS, suddenly NONE, and suddenly REVERSED.
Well i had thought that it would be a thing that just happened daily and every now and then the gravity changes ,but utilising it would prove interesting.
Just to play devil’s advocate here. What will this add to the game, will it be fun or just annoying and does it matter to the story? Sometimes things like this sound cool (and it does sound cool) but in actual play it’s just bothersome. It could be the kind of thing that works better in small doses, as in a single dungeon as gamsii suggested, rather than a global phenomenon. Maybe try doing it in a dungeon and see if you think it would work across an entire campaign.
I would recommend at the least a test dungeon to see how your players react to the gravity switching and to see if you like running it. If it's a hit, maybe the bad guy runs off with the gravity gem or whatever that makes gravity be normal so now the whole world is affected.
If it can help.
"Normality is but an Illusion, Whats normal to the Spider, is only madness for the Fly"
Kain de Frostberg- Dark Knight - (Vengeance Pal3/ Hexblade 9), Port Mourn
Kain de Draakberg-Dark Knight lvl8-Avergreen(DitA)
did you make/draw that?
nope found it somewhere and saved it in case i needed it
"Normality is but an Illusion, Whats normal to the Spider, is only madness for the Fly"
Kain de Frostberg- Dark Knight - (Vengeance Pal3/ Hexblade 9), Port Mourn
Kain de Draakberg-Dark Knight lvl8-Avergreen(DitA)