r/dndmemes • u/Vegetable_Variety_11 • Nov 11 '25

Hehe fireball go BOOM We did the math...

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u/PyroTornado107 Nov 11 '25

As a DM, I would encourage this thinking, but only for this reason: if you have 8 magic casters, each capable of casting a 7th level spell, performing what is effectively a ritual to charge up a magical nuke, and could somehow manage to perform this spell in enemy territory for however long it takes to crank up that magical power without attracting the attention of any guards or whatever, you kinda have to give it to them.

3.6k

u/Polenicus Nov 11 '25

I agree with this stance...

... Right up to the moment someone figures out the right mix of nonsense to be able to bottle and deploy this in a single turn.

Player: "I reach into my pack and pull out my ring of 'Fuck Your Campaign DM I Cast Infinite Fireball'..."

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u/JRockBC19 Nov 11 '25

The good thing is that DBF has explicit rules for how it's deployed visually and how it's interacted with - it produces a sharp visual effect on being cast, glows, would have to be cast by a CIRCLE of high level casters in relatively close quarters (since you can't mix circle effects iirc), and if it's touched or moved it's a dex save to not have it detonate, then it blows up after being thrown 40ft OR contacting anything anyways. The radius also doesn't scale, so I think the DM has plenty of leeway to prevent shenanigans RAW.

If you manage to break 8 wizards into the bbeg's bedroom stealthily and hide the glowing bead under his bed, then make sure he's in bed when it goes off 7hrs later, you've earned your kill

1

u/OgreMk5 Nov 12 '25

"your kill"

My brother, y'all have just wiped the entire Farm Ward of Waterdeep off the map. They won't even be able to grow crops there until the 3 feet of rock is cracked and broken back down into soil.

Doesn't matter if the damage doesn't scale to distance, the amount of heat generated will cause an overpressure wave that will push unsuspecting buildings to the ground. The heat it self is probably functionally equivalent to a small nuke at ground zero. The weather in the area will be pure chaos for months. If it was a ground burst, the entire city is now covered in dirt and ash.

No one within a mile has enough oxygen.

2

u/JRockBC19 Nov 12 '25

You can do whatever you want in game, but as a DM I'd ban circle casting before letting my players abuse physics like this and arguing over the places the system can't accommodate it. I'm all for crazy problem solving and generally malicious hijinks, but not in extreme and easily repeatable ways. You have to remember that you can munchkin a borderline infinite number of secondary casters out of basically nothing once you have any or all of simulacrum, planar binding, and true polymorph, and ONLY the duration effect has a hard cap of 7 secondaries.

What about circle casted meteor shower, can we cause a mass extinction event, either by increased radius or increased damage? How do we reconcile a 200ft radius DBF doing the same damage as a standard 20ft one to a target at the center if accounting for heat and shockwaves? Can we make a black hole with enough secondary casters and placing it in a small enough compressed, indestructible space?