How to build a proper alchemical (but not alchemist) bomb?

[Ansibelle]

The alchemical item Phosphorescent Gel (http://www.d20pfsrd.com/equipment---final/goods-and-services/herbs-oils-ot her-substances#TOC-Gel-Phosphorescent) seems basically designed to be a fuse for a bomb - but there don't seem to be rules on how to build or assess damage from such a thing if, for example, one wanted to blow a hole through a city wall.

Let's assume that we're working without alchemist (class) bombs. Given that, is there a way within the RAW to effectively build such a thing?

[CloudCobra]

There's the Pellet grenade and the Fuse bomb.

Otherwise, you might want to check out the PureSteam setting, or the Black Powder bomber alchemist archetype from Abandoned Arts, or the Scientific Innovator alchemist archetype from Veranthea Codex.

[Zwordsman]

There isn't any real guidelines that i know of..
but most gm's wouldn't be opposied to the whole gunpowder or pile of alchemical items sorta things..
freankly though the timing is so difficult to do without a way t osped it up.. that i see no reason ever to not just spend a min trying to hit it with flaming arrows in most cases.. or throwing a smaller bomb into it.. or spark spell or all that..

Though i'ts pretty funny trick for people you don't like.

"here this glows so you keep your hands free. smother it on your armour." 1 hour later... you attack and they burst into flames during

[Ansibelle]

Zwordsman wrote:

i see no reason ever to not just spend a min trying to hit it with flaming arrows in most cases.. or throwing a smaller bomb into it.. or spark spell or all that..

No? What if the explosion is meant to distract guards while the party does something else somewhere else? Or what if you'd like time to establish an alibi about your involvement with it (I can't possibly have been involved, I was very visibly giving a bardic performance on the other side of town!)? Or what if you'd like time to get out of the coal mine before your explosion collapses it on the eldritch horrors contained therein?

[Zwordsman]

Ansibelle wrote:

Zwordsman wrote:

i see no reason ever to not just spend a min trying to hit it with flaming arrows in most cases.. or throwing a smaller bomb into it.. or spark spell or all that..

No? What if the explosion is meant to distract guards while the party does something else somewhere else? Or what if you'd like time to establish an alibi about your involvement with it (I can't possibly have been involved, I was very visibly giving a bardic performance on the other side of town!)? Or what if you'd like time to get out of the coal mine before your explosion collapses it on the eldritch horrors contained therein?

I like the first few. .but an hour and i'm sure that eldritch horror would've found and snuffed out the explosion. .that i assume would cover some door or something to freedom (Like Alone in the Dark style).

but in that case I assume you just have the damage the goo does vs the container of explosions' hardness(which i guess doesn't apply to elemental?) and then hp. and if it gets through it then it would ignite normally ignitable things.
So probalby use a paper top for a small amount of gunpowder which explosion will set off the bigger actual explosion barrells.

[Ansibelle]

Zwordsman wrote:

I like the first few. .but an hour and i'm sure that eldritch horror would've found and snuffed out the explosion. .that i assume would cover some door or something to freedom (Like Alone in the Dark style).

I suppose that depends if the eldritch horror has any knowledge that helps it understand alchemy. It might - but that seems less likely than it knowing all about any magical approach you might take. ;)

[Guardianlord]

In our own games we use twine, soaked in oil as fuses. I don't remember where, but we found an idea online for fuses producing 1d4 rounds of delay (due to imperfections). Using this you can rig up a fused Keg, the fuse being lit by any source of heat that can do 0h, 1hp damage to it, then the fuse ignites the black powder (which is still contained in the keg), add irons spikes for even more fun.
A gunslinger with craft alchemy can create a LOT of kegs for cheap, fast, and as each keg goes, more fuses can be lit for even more fun.
Plus kegs are small enough to be hidden easily, say hidden among some wine kegs the Eldrich horror has lying around (why is one glowing, and then sparking?).