@brennanleemulligan: What is YOUR favorite magical item, and how does it strain traditional Newtonian physics?

Brennan Lee Mulligan
Brennan Lee Mulligan
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Wednesday 29 October 2025 19:20:53 GMT
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wikipedia
Wikipedia :
*Immediately opens the Wikipedia article on Newton's laws of motion*
2025-10-29 19:43:02
3246
werejess
WereJess :
two immovable rods become a ladder to infinity
2025-10-29 19:29:38
5574
veilenity
veilenity :
Seconded!!!! It’s SO USEFUL. I’ve used it to mount a bbeg, I used it to cross a lake that had “no other way” across.
2025-11-03 21:09:31
0
rngeek
RNGeek Games :
Hmmmm. It's a difficult item. Immovable doesn't necessarily mean stationary. Since movement is relative, the rod isn't so much Immovable when activated. More, it's unaccelerateable. Meaning whatever motion it had, such as being on a planet, orbiting a sun, orbiting a galaxy or plane, moving through intergalactic space, looks as though it's stationary but, instead, maintains its accumulated velocity when the button is pushed, making it appear stationary relatively to the earth. However, remove the planet beneath it after activation and you'll find it continues its linear velocity from when the moment the button was first pressed. THIS leads to some wonky things. First, unaccelerateable doesn't necessarily mean it isn't affect by gravity. Light, for example, at any given time is always traveling and can only travel the speed of light but is, itself, affected by gravity. The appears as acceleration, any change in speed in any direction, ie curving around a gravitational body, but is in fact a straight line through curved space. In fact, I believe the best way to calculate or surmise an outcome to the Immovable rod interacting with an object or energy, is to consider it exactly the same as a light particle with a few caveats. One, it's speed is not c, but whatever it's speed was at activation. Two, it has an astronomical amount of mass compared to a particle. And three, it is not point-like nor a wave-particle. It is a macroscopic, solid rod. SO! Let's say you were to push the button to climb with it. Technically, it would succumb to gravity and wouldn't work. Damn. That was lamer than I expected. Except...it wouldn't stop when it touch the ground, it would free fall, unable to be decelerated and gaining and apparent acceleration due to gravity, burrowing to the core, past, and out the other side at exactly the same height (given a perfect sphere and homogenous gravity through the planet), before going back through the planet at a very slightly different spot and swinging through it again. Ad infinitum. (Technically and unfortunately, to preserve momentum, it would phase through the planet affecting nothing).
2025-11-03 20:22:25
0
coreyhonkonen1701
Corey Honkonen :
I mean, more than 8,000 pounds causes the rod to deactivate and fall, so it's just a matter of whether the airship exerts more than 8,000 pounds of force on the rod or not...
2025-10-29 19:33:45
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adriannfrost
Adrian Frost296 :
it still has hardness and hit points any sufficient blunt force hitting it would destroy it.
2025-11-01 20:25:03
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someoneiswrong
Someone Is Wrong :
Immovable relative to what? The world?
2025-11-02 19:26:58
1
hederafleuron
HederaFleuron :
Oh lord, if Ally Beardsley learns about this, Brennan is going to quit DMing again
2025-10-29 19:46:58
214
dj_swatt
shhhh :
Wouldn't that be a problem with a rotation of the planet and the movement of the planet around the sun
2025-10-31 20:31:13
1
chubba_games
Chubba_Games :
I would love it if someone clicked the immovable rod and it just starts to float off into the sky, since the planet is in orbital motion around a star but the immovable rod is a fixed point
2025-10-29 19:43:39
442
dinojetpack
Aaron (a dinosaur) :
the lion does not concern himself with the Earth's rotation
2025-10-29 23:35:31
1562
coke_on_a_string
coke :
unless you're not in a galaxy your moving soooooooooooo.......
2025-11-01 10:27:23
0
avatarml
AVATARML :
So does the rod not move according to the planets movement, the users movement, or the closest stars movement. Because depending on your choice, it could suddenly accelerate to hundreds of miles per hour
2025-10-30 22:00:09
4
chasea0702
ChaseA0702 :
"cannot move in space" so the earth will just move on without it or it will go through the earth?
2025-10-29 22:38:59
16
sloanyboneybologna
Thedon :
Need to see the immovable rod in the new campaign of cr
2025-10-29 19:29:09
318
favoritetim
FavoriteTim :
the immovable rod proves a flat earth.
2025-10-30 10:51:12
0
kaboombox87
Kaboombox/Narrator :
always been easy for me. objest have hardness and hit points. rod is destroyed.
2025-11-01 15:12:26
1
xxtolsonxx
xXTOLSONXx :
wouldn't the earth spin into the rod? if it is unmovable in space
2025-10-29 20:25:12
1
faeryman
faeryman :
hi, uh...if the rod doesn't move in space but the earth is rocketing through space......
2025-10-30 04:05:06
11
paxtheskeleton
PaxTheSkeleton :
Wouldn’t the immovable rod just not move alongside the planet ? So from our perspective it would just FLY at another direction
2025-10-31 00:01:32
2
hillstarone
HillstarOne :
Is there an unstoppable force in DnD? I wanna try something
2025-10-29 19:52:12
18
sgt.wolf
Sgt Wolf :
*tries to argue to DM “so since space and time are one, if I’m holding the immovable rod when activated, I should freeze time around me, right?”
2025-10-30 15:10:18
9
davidjoneskrause
David Jones-Krause ✡️🍉 :
He’s just right
2025-10-30 17:31:18
4
immapanda5
Anushka :
or when you dimention door into a dragon and then leave the rod floating in its stomach
2025-10-30 17:18:10
25
fourthlinemagic
FourthLineMagic :
All objects in the universe are always in motion (on a relativity basis) ... so does an immoveable rod stay static on a planet relative to its orbit/axis rotation? Or does DND not take place in a planetary system? 🤷
2025-10-30 06:03:46
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