Talk:Siege Cannon (3.5e Epic Spell)

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Here's how I came about this spell.

To find the size of the cannon: Find the size of two cylinders, and subtract the smaller cylinder (the inside area of the barrel) from the larger cylinder.

1.5ft x 10ft = outside of gun, 1.25ft x 9ft = inside of gun

71 - 44 = 27 27 - 20 (first 20 cubic feet comes with spell) = 7 cubic feet 7 x (+2) = +14 DC

find the area of the shot being fired: 4/3pi*(1.25)^3 = 8 cubic feet = +16 DC

find the amount of powder craft (alchemy) check (DC 10) req'd 1.25cubic feet req'd = +1 DC

total DC for shot + cannon = +31 plus base = 21 (conjure) + 31 = 52 DC

To get the damage for this weapon, I started out with the "musket" on page 146 of the DMG. It does 1d12 damage, and is a medium weapon with a 150 foot range increment and 10 lb weight. Looking at the table 2-2 on page 28 of the DMG, you can see that a "colossal" musket would do 8d6 damage. So let's look at how much a colossal musket weighs. Assuming that a weapon doubles in weight for every size category, a colossal musket would weigh 160 lbs.

Our cannon is 27 cubic feet of steel. I'll assume 450 lbs per cubic foot, a reasonable number. So our cannon weighs 12,000lbs. That's about colossal +6. So let's use that. Assuming +2d6 per size category, we can say that our weapon here does about 20d6 damage. Not bad for DC 52.

It's pretty easy to understand why Large and smaller creatures don't stop the cannonball.

--Othtim 00:10, 13 October 2007 (MDT)

oh crap, just realized I misspelled siege >_< --Othtim 00:11, 13 October 2007 (MDT)
I fixed the name for you :). --Green Dragon 12:23, 14 October 2007 (MDT)
You rock! --Othtim 13:05, 14 October 2007 (MDT)
Why Energy Seed? To Cause Damage? This spell don't look like anything in Energy Desc. Arielby 10:12, 31 January 2008 (MST)
(EDIT: Oops, nevermind, I can't read at all. Anyway, I like the taste of this.) - Eiji 11:55, 31 January 2008 (MST)
Energy is used to ignite the powder on the casters command. The caster doesn't have to manually ignite the weapon. ill clarify in the description. --Othtim 01:14, 2 February 2008 (MST)
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