
Azothath |
a Familiar in RAW is 'stuck' as is. It runs off the master's level, saves, skill ranks etc.
In a home game your GM is the arbiter/gate keeper for what you want.
As a construct it is not stellar in skill ranks or abilities.
In a home game I can see doing a spin-off of leadership keeping the familiar at CR=(CL-2) or there abouts. There should be a cost to balance that out.

zza ni |

as every extra hd is +2000 gp to the crafting cost. 50hd would be over 100,000 gp (as base is around 2000).
i would think twice before crafting something that costly that can be taken away from me with a spell (no save! a scroll of which would cost 2,275 gp to buy), a drop of my blood and 625 worth of an alchemical remedy..
i mean, it take over 100,0000 gp to make (and around 100 or 50 days to craft it) and less then 3,000 gp to lose. Mind your step there.

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So my GM confusion is: if it is that simple to build a 276 hp, Dc 37 poison, +50 bab death machine with whatever killer combo you can devise with 26 feats to select, why didn't anyone already do it? Why isn't every important Thassalonian ruin crawling with them?
Cannot heal damage on its own, but often can be repaired via exposure to a certain kind of effect (see the creature’s description for details) or through the use of the Craft Construct feat. Constructs can also be healed through spells such as make whole. A construct with the fast healing special quality still benefits from that quality.
A homunculus can't heal damage by itself and has no DR. 276 hp will not last long if you can't recover them. Any creature with a DR of 3+ could destroy the "death machine" without taking 1 hp of damage. The feats can change that, but it will still be a very weak death machine. In ideal circumstances, it could stay active for a couple of centuries after the death of its master, but no more, unless it is in a sealed vault.

zza ni |

The dc 60 spellcraft check needed for that spell makes it not quite so easy....
The issue I would worry about is how the 50% limit on increasing construct HD is being bypassed.
the dc is to maintain the control.
all he need is the 1st one round of control:order - "Drink!" (if the master is not close enough to warrant an opposing check, there is no roll needed)
done...
("and now...bow to your new master!"

Java Man |

Well after spending 100kgp on building these constructs I hope I have a few bucks left over for scavenging stones or wands of make whole to supply it with (plenty of skill points for umd). After some str increases and power attack it will be biting for d4+40 dmg, so DR isn't slowing it down. And could probably find some feats to get it a bow of some kind, maybe a cute little pike.
Are there weaknesses that could still be exploited? Yes. Do I think the rules should allow this monstrosity? No. Will anyone who disagrees with me change their stance based on my words here? No. Why am I bothering? Damn good question.

zza ni |

for 100k gp you can craft a brass golem while not 50hd that one has a self healing function (and pretty impressive dr and immunity).
the free action cinder breath fill a space he can get in and heal him for 1/3 the damage. it last 1d6 rounds and can be used every 1d4 rounds meaning he can most likely keep it up for the entire fight.
if it's damage you look for a lightning gun cost 95k to buy (half to make) and can be used to deal 10d12 each round so average of 60 damage with 120 feet ranged touch attack.

Azothath |
look - the OP took it to an impractical level but I've seen worse. RAW lets you increase the homunculus HD with GM approval. Class levels are out by RAW.
I'd agree there are better things to craft with that much gold and then use.

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Java Man wrote:The dc 60 spellcraft check needed for that spell makes it not quite so easy....
The issue I would worry about is how the 50% limit on increasing construct HD is being bypassed.
the dc is to maintain the control.
all he need is the 1st one round of control:order - "Drink!" (if the master is not close enough to warrant an opposing check, there is no roll needed)
done...
("and now...bow to your new master!"
You need the blood of the original master, and I think that you need to concentrate immediately to maintain control, even the round you cast the spell.

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Well after spending 100kgp on building these constructs I hope I have a few bucks left over for scavenging stones or wands of make whole to supply it with (plenty of skill points for umd). After some str increases and power attack it will be biting for d4+40 dmg, so DR isn't slowing it down. And could probably find some feats to get it a bow of some kind, maybe a cute little pike.
Are there weaknesses that could still be exploited? Yes. Do I think the rules should allow this monstrosity? No. Will anyone who disagrees with me change their stance based on my words here? No. Why am I bothering? Damn good question.
Even with 12 strength increases it will reach 1d4+5. Maybe you can add other construct modifications to add more strength, but that is even more money.
If the GM allow the applications of other construct modification to the homunculus, self repair is better than wands.If we apply multiple construct modifications it will become a powerhouse, I agree, but it will cost even more.
As with all constructs, it is a matter of cost against quality.

Trokarr |

The PFS FAQ on Homunculus augmentations has this to say: “Some familiars, such as the homunculus and clockwork familiar, have a listed crafting cost in their statistics. How can I create these familars in the Pathfinder Society Roleplaying Guild?
When selecting one of these familiars, you may assume that you or an NPC crafts the familiar without paying the cost listed in the creature's entry. You need only pay the price of any augmentations that you add to your construct familiar, such as additional Hit Dice for your homunculus. You cannot upgrade your homunculus to have more Hit Dice than your character level.”
So while this is meant for PFS, a much more restrictive rule set than for home games, it does give you an indication of what Paizo thinks is an appropriate number of HD for a homunculus to have at any given level. I wouldn’t be quite so restrictive myself however. I think 2 HD per level is a pretty reasonable number.

Azothath |
Advice
with extra HD comes Univ Mon Rules and thus BAB, AC, Feats, skill points, CR etc... so from a Game Balance view it's best to minimize the impact to CR and keep it about CR=(CL-2). That ensures that the party's CR is not going to rise significantly.
If you look at the Animal Companion advancement table you can see HD=CL is generous.
Familiar
Using HD as a scalar is okay and at 1*CL that is going to guarantee that "your little buddy" isn't going to be significant (which is the point in Org Play).
HPs are still limited to half the caster's as it's a familiar.
I'll mention that the Mascot archetype can target a high HP creature to increase its BAB & HPs. Of course the Protector archetype can split damage with its Master, so consider the Master with 1.25*HPs.
the OP wasn't clear on exactly what he's up to. I'd expect it to be a familiar as Leadership feat wasn't mentioned.

Chell Raighn |

Whether or not the homonculus in question is or is not a familiar has a massive impact on the effect of the added HD. If it is a familiar it's hp and bab will not be increasing, so the added hd don't have nearly the impact.
If its a familiar the added HD will only change how many skill points it has of its own and how many feats it has… since everything else that is normally calculated by HD is set by the familiar rules based on the master’s stats.

Temperans |
1st of all, if this is for a homunculist the homunculus cannot get bonus hit dice as per the "created with extra" because you use the familiar rules for it. Familiar rules say that it has your level in hit dice and that's it.
2nd, if this is for the promethean alchemist the hominculus cannot get bonus hit dice per the "created with extra" because you use the specific companion. That table says it gets X hit dice at level Y and that's it.
3rd, you could not make a monster with 50 hit dice given that the highest HD for a level 20 creature is for a Fey. Even assuming you went to a much higher level that is clearly way beyond what the game allows given the various rules.
4th, the Ultimate Magic construct modification guidelines should apply to homunculus limiting it to 3 HD.
5th, even if you don't apply the 50% limit from ultimate magic you have to apply the CR/HD limit from the bestiary or say it only applies for a given CR. That being that a tiny creature cannot have a CR higher than 6 which for a construct gives a value of 8 HD, max 12 with thr 50% extra.
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If the GM is allowing 50HD homunculus than the power limit might as well be infinite because clearly they don't care.