How Magical Bloodlines Work

for Spellcasters and Their Babies in The Sims 4

The Sims 4 Realm of Magic - Magical Bloodline Trait
The Magical Bloodline Trait is a new feature in Realm of magic

Magical Bloodline is a trait passed on by Spellcasters to their children, which results in a few benefits for the child should they choose to pursue Spellcasting. There are also mechanics that decide whether a Sim's offspring will be a caster in the first place, given the possibility for casters to have children with a non-caster or another type of occult.

Realm of Magic Guides

What Magical Bloodline Does

The Magical Bloodline trait does a few things based on the strength. There are three levels to it:

  • Weak Bloodline: Gives 10% more Spellcasting XP and +1 talent point on each rank up in Spellcaster. You are also 10% less likely to suffer an overload.
  • Strong Bloodline: Gives 20% more Spellcasting XP and +1 talent point on each rank up in Spellcaster. You are also 20% less likely to suffer an overload.
  • Ancient Bloodline: GIves 30% more Spellcasting XP and +1 talent point on each rank up in Spellcaster. You are also 50% less likely to suffer an overload.

Spellcaster, Alien, and Vampire

Infatuate doesn't work on yourself, so can't be used to further your bloodline.
I wondered if you could use Infatuate to get another Sim to like you. I guess if you want to pass on those genes you're going to need to do it the old fashioned way.. or use a Love Potion.




This is relevant to look at first, because if your Spellcaster has offspring with a non-caster occult it's possible for the other occult to pass. It's almost always 50/50, although a witch with an alien would appear to always produce a witch or full-blooded alien and a witch with half-alien could result in witch (50% of the time), no occult (25%) or half-alien (25%). A witch with vampire would result in 50/50 between witch and vampire. Not too complicated, except in the case of half aliens and in particular if you throw in Dark Ley Line which will always make vampire extremely likely no matter the other combos.

Passing on Magical Bloodlines

The game only seems to care about one parent's bloodline - whoever has the highest rank. It can both strengthen and weaken the bloodline. Depends if the parent is actually a Spellcaster. Let's look at that first. If they are a spellcaster it increments from caster with no bloodline to weak bloodline, strong, and finally ancient. If you have a weak bloodline breeding with strong, you will get an ancient because the strong is taking priority. Two weaks won't make an ancient, they'll make a strong. It's super simple in that way.

So, an interesting thing about all this is if a non-witch has the magical bloodline trait and passes it on without manifesting (becoming a witch via the quest from the Sages) the bloodline will dilute. It's in the game code that an ancient will produce a strong if neither parent is a witch. I suppose two non-witches with magical bloodline would pass down from the strongest one.

So does this mean you could have an ancient bloodline, pass it on to a non-Spellcaster (either not witch by birth, another occult or took Rite of Dissolution) and a couple generations down have a Sim with weak magical bloodline who takes up casting and begins to re-strengthen the bloodline? It looks like it.

I don't normally do this type of content but they put enough effort into Magical Bloodline that I thought some people would care. If you have something interesting about how this works, pass it on in the comments and let me know if I've made any mistakes.

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Comments (4)

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Beccasays...

Thank you a ton for this! I could not find a comprehensive guide to this aspect of the game anywhere.

I thought I remembered the gurus saying that the strength of the spellcaster also impacted the bloodline trait. Based on your info, does that factor in to how weak/ strong the game considers a parent's bloodline?

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Playalotsays...

Yes, read the guide under the heading "Passing on Magical Bloodlines" and Carl explains this mechanism.

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I have an question ...says...

I was playing with a woman (young adult) and her bf (also young adult), both of them are spellcasters.I I wanted to try for baby, but i couldn't find the option.I kept looking on the internet and STILL didn't find it out.Do you know why?As i was searching on this website .i was about to click on "The Sims 4 Woohoo and Try for Baby Guide" but before i read the small fragment underneath and it said something about the new pack and the option, but it was all separated by :".." .I read the articles multiple times to see if i was missing something but still couldn't find anything.please help?:/

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Playalotsays...

Sims need a high enough romantic relationship before woohoo and try for baby options will unlock. But male spellcasters can definitely have nooboos as both mine did so just fine. If you are referring to Morgan the Sage, they transgender so when you look at their settings in CAS you can see they can neither get pregnant nor make others pregnant, so no nooboos for Morgan unless you adopt.

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Danielle Crystalsays...

I have learned after playing that a male spellcaster can't try for a baby. A female spellcaster, however, can try for a baby with a regular sim.

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Maybradsays...

If you guys are talking about Morgyn, they can’t have children as it’s in their settings in CAS. I’m not sure if theres a bug that applies to all male spellcasters, however. But morgyn was intended, it seems, to be non binary and infertile.

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Playalotsays...

Definitely not a bug with all male spellcasters as both my males were able to have children fine. Morgan is transgender so when you look at their settings in CAS you can see they can neither get pregnant nor make others pregnant, so no nooboos for Morgan unless you adopt.

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Ukusays...

This was an interesting thing to me. I had a vampire and spellcaster have a child, with one of the lot traits being Dark Ley Line. They ended up being both a vampire and spellcaster, having the needs of a vampire and able to receive vampire training along with burning in the sun yet they has the perks of a Spellcaster. Not sure how it's meant to work in the slightest but that's how it is currently.

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Ukusays...

Heck, I'm an idiot, ignore this, I misread the 50/50 part

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Playalotsays...

What you have is simply a vampire who has the bloodline trait which they can pass down to their children. So it isn't a hybrid really..just a trait that passes down family generations. So your vampire (with caster perks) child is a human, then they could become a caster and benefit from this passed-on bloodline trait if it is strong enough.

If this is correct and you can have a child with your vampire to confirm this, that would be great. We're confident (sadly) that we have it right but would be delighted to be wrong in this case!

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confusedsays...

I have a set of twins. The mom is a spellcaster and the dad is a mermaid. One of the twins is a mermaid and the other one has the spellcaster trait and is a mermaid. She is at the acolyte level. I'm having problems with it though because she will look like an ordinary sim but when I have her go in the water she loses the lower half of her body and when she is out of the water her body is that of a mermaid and gets stuck like that. Is anyone else having this problem?

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Playalotsays...

Oh dear! That is quite the bug. I suggest you make a report on the official bug forum and bring this to the devs notice.

EA TS4 Bug Forum



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